{"title":"Opus 88 Demonstrator","description":"\u003cp\u003eOpus 88 Demonstrator, a notable series among Opus 88 pens, allow you to see ink levels of the pen when capped or uncapped. These beautiful pens come in a variety of colors and are available exclusively as fountain pens.\u003c\/p\u003e","products":[{"product_id":"opus-88-koloro-fountain-pen-in-color-demo","title":"Opus 88 Demonstrator Fountain Pen in Color","description":"\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003eFor true purists of the writing experience, Opus 88 crafted the DEMO with translucent acrylic resin. Enjoy watching your ink color of choice slosh around the massive 3.5mL capacity of this eyedropper filling fountain pen. Engineered for serious fountain pen enthusiasts who love to use their pens to write at extreme length, the Opus 88 Demonstrator is one of the few modern pens to feature an eyedropper filling only system that has a shut-off valve. More commonly found in Japanese vintage fountain pens, the valve regulates the ink flow to prevent ink burping on the page.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOpus 88 Demo Eyedropper Filling Fountain Pen Details:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBarrel and Cap crafted from translucent acrylic resin\u003c\/li\u003e\n\u003cli\u003eNib: Stainless steel #6 nib with plastic feed\u003c\/li\u003e\n\u003cli\u003eFilling System: Eyedropper (includes glass eyedropper) with shut-off valve to safeguard against leakage.\u003c\/li\u003e\n\u003cli\u003ePen Length Closed: 5.63 in. \/ 143mm\u003c\/li\u003e\n\u003cli\u003ePen Body Max Diameter: 0.63 in. \/ 15.9mm\u003c\/li\u003e\n\u003cli\u003ePen Total Weight: .9 oz \/ 23g\u003c\/li\u003e\n\u003cli\u003eInk Capacity: ~3.5ml\u003c\/li\u003e\n\u003cli\u003eGift boxed with an instruction booklet and eyedropper\u003c\/li\u003e\n\u003cli\u003eMade in Taiwan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Opus 88 Pens","offers":[{"title":"Extra Fine","offer_id":33902660190347,"sku":"96086520EF","price":125.0,"currency_code":"USD","in_stock":true},{"title":"Fine","offer_id":33902660157579,"sku":"96086520F","price":125.0,"currency_code":"USD","in_stock":true},{"title":"Medium","offer_id":33902660124811,"sku":"96086520M","price":125.0,"currency_code":"USD","in_stock":true},{"title":"Broad","offer_id":33902660223115,"sku":"96086520B","price":125.0,"currency_code":"USD","in_stock":true},{"title":"1.5mm Stub","offer_id":33902660255883,"sku":"960865201.5","price":125.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1693\/8459\/products\/opus-88-demonstrator-fountain-pen-in-color-665.jpg?v=1762201450"},{"product_id":"opus-88-fountain-pen-in-demonstrator","title":"Opus 88 Fountain Pen in Demonstrator","description":"\u003cp\u003eFor true purists of the writing experience, Opus 88 crafted the Demo with clear acrylic resin. Enjoy watching your ink color of choice slosh around the massive 2mL capacity of this eyedropper filling fountain pen. Engineered for serious fountain pen enthusiasts who love to use their pens to write at extreme length, the is one of the few modern pens to feature an eyedropper filling only system that has a shut-off valve. More commonly found in Japanese vintage fountain pens, the valve regulates the ink flow to prevent ink burping on the page.\u003c\/p\u003e\n\u003cp\u003eOpus 88 Demo Eyedropper Filling Fountain Pen Details:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBarrel and Cap crafted from transparent acrylic resin\u003c\/li\u003e\n\u003cli\u003eStainless steel nib\u003c\/li\u003e\n\u003cli\u003eEyedropper filling system with a built-in shut-off valve\u003c\/li\u003e\n\u003cli\u003eGift Boxed with an eyedropper\u003c\/li\u003e\n\u003cli\u003eMade in Taiwan\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Opus 88 Pens","offers":[{"title":"Medium","offer_id":39496904245387,"sku":"96083900M","price":120.0,"currency_code":"USD","in_stock":true},{"title":"Fine","offer_id":39496904278155,"sku":"96083900F","price":120.0,"currency_code":"USD","in_stock":true},{"title":"Broad","offer_id":39496904310923,"sku":"96083900B","price":120.0,"currency_code":"USD","in_stock":true},{"title":"1.5mm Stub","offer_id":39496904343691,"sku":"96083900STUB15","price":120.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1693\/8459\/files\/opus-88-koloro-fountain-pen-in-demonstrator-722.jpg?v=1762269407"},{"product_id":"opus-88-demonstrator-fountain-pen-in-minty-light-blue","title":"Opus 88 Minty Fountain Pen in Light Blue","description":"\u003cp\u003eFor true purists of the writing experience, Opus 88 crafted the DEMO with translucent acrylic resin. Enjoy watching your ink color of choice slosh around the massive 3.5mL capacity of this eyedropper filling fountain pen. Engineered for serious fountain pen enthusiasts who love to use their pens to write at extreme length, the Opus 88 Demonstrator is one of the few modern pens to feature an eyedropper filling only system that has a shut-off valve. More commonly found in Japanese vintage fountain pens, the valve regulates the ink flow to prevent ink burping on the page.\u003c\/p\u003e\r\n\u003cp\u003eOpus 88 Demo Eyedropper Filling Fountain Pen Details:\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eBarrel and Cap crafted from translucent acrylic resin with chunks of white, light blue and turquoise\u003c\/li\u003e\r\n\u003cli\u003eNib: Stainless steel #6 nib with plastic feed\u003c\/li\u003e\r\n\u003cli\u003eFilling System: Eyedropper (includes glass eyedropper) with shut-off valve to safeguard against leakage.\u003c\/li\u003e\r\n\u003cli\u003ePen Length Closed: 5.63 in. \/ 143mm\u003c\/li\u003e\r\n\u003cli\u003ePen Body Max Diameter: 0.63 in. \/ 15.9mm\u003c\/li\u003e\r\n\u003cli\u003ePen Total Weight: .9 oz \/ 23g\u003c\/li\u003e\r\n\u003cli\u003eInk Capacity: ~3.5ml\u003c\/li\u003e\r\n\u003cli\u003eGift boxed with an instruction booklet and eyedropper\u003c\/li\u003e\r\n\u003cli\u003eMade in Taiwan\u003c\/li\u003e\r\n\u003c\/ul\u003e","brand":"Opus 88 Pens","offers":[{"title":"Medium","offer_id":40804855349387,"sku":"96082202M","price":130.0,"currency_code":"USD","in_stock":false},{"title":"Elastic Fine","offer_id":46209189216395,"sku":"96082202FLF","price":130.0,"currency_code":"USD","in_stock":true},{"title":"Elastic Extra Fine","offer_id":46209189249163,"sku":"96082202FLEF","price":130.0,"currency_code":"USD","in_stock":true},{"title":"Fine","offer_id":40804855382155,"sku":"96082202F","price":130.0,"currency_code":"USD","in_stock":true},{"title":"Extra Fine","offer_id":40804855414923,"sku":"96082202EF","price":130.0,"currency_code":"USD","in_stock":true},{"title":"Broad","offer_id":40804855447691,"sku":"96082202B","price":130.0,"currency_code":"USD","in_stock":true},{"title":"1.5mm Stub","offer_id":40804855480459,"sku":"960822021.5","price":130.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1693\/8459\/files\/ec64e9bc-c7e2-403f-815b-11f8f8881f6e.jpg?v=1773690788"},{"product_id":"opus-88-demonstrator-fountain-pen-in-minty-orange","title":"Opus 88 Minty Fountain Pen in Orange","description":"\u003cp\u003eFor true purists of the writing experience, Opus 88 crafted the DEMO with translucent acrylic resin. Enjoy watching your ink color of choice slosh around the massive 3.5mL capacity of this eyedropper filling fountain pen. Engineered for serious fountain pen enthusiasts who love to use their pens to write at extreme length, the Opus 88 Demonstrator is one of the few modern pens to feature an eyedropper filling only system that has a shut-off valve. More commonly found in Japanese vintage fountain pens, the valve regulates the ink flow to prevent ink burping on the page.\u003c\/p\u003e\r\n\u003cp\u003eOpus 88 Demo Eyedropper Filling Fountain Pen Details:\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eBarrel and Cap crafted from translucent acrylic resin with chunks of white, light orange\u003c\/li\u003e\r\n\u003cli\u003eNib: Stainless steel #6 nib with plastic feed\u003c\/li\u003e\r\n\u003cli\u003eFilling System: Eyedropper (includes glass eyedropper) with shut-off valve to safeguard against leakage.\u003c\/li\u003e\r\n\u003cli\u003ePen Length Closed: 5.63 in. \/ 143mm\u003c\/li\u003e\r\n\u003cli\u003ePen Body Max Diameter: 0.63 in. \/ 15.9mm\u003c\/li\u003e\r\n\u003cli\u003ePen Total Weight: .9 oz \/ 23g\u003c\/li\u003e\r\n\u003cli\u003eInk Capacity: ~3.5ml\u003c\/li\u003e\r\n\u003cli\u003eGift boxed with an instruction booklet and eyedropper\u003c\/li\u003e\r\n\u003cli\u003eMade in Taiwan\u003c\/li\u003e\r\n\u003c\/ul\u003e","brand":"Opus 88 Pens","offers":[{"title":"Medium","offer_id":40804932747403,"sku":"96082203M","price":130.0,"currency_code":"USD","in_stock":false},{"title":"Elastic Fine","offer_id":46209580630155,"sku":"96082203FLF","price":130.0,"currency_code":"USD","in_stock":true},{"title":"Elastic Extra Fine","offer_id":46209580662923,"sku":"96082203FLEF","price":130.0,"currency_code":"USD","in_stock":true},{"title":"Fine","offer_id":40804932780171,"sku":"96082203F","price":130.0,"currency_code":"USD","in_stock":true},{"title":"Extra Fine","offer_id":40804932812939,"sku":"96082203EF","price":130.0,"currency_code":"USD","in_stock":true},{"title":"Broad","offer_id":40804932845707,"sku":"96082203B","price":130.0,"currency_code":"USD","in_stock":true},{"title":"1.5mm Stub","offer_id":40804932878475,"sku":"960822031.5","price":130.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1693\/8459\/files\/160a883c-c313-4724-b724-44fcf382c17e.jpg?v=1773690967"},{"product_id":"opus-88-demonstrator-fountain-pen-in-sapphire","title":"Opus 88 Demonstrator Fountain Pen in Sapphire","description":"\u003cp\u003eFor true purists of the writing experience, Opus 88 crafted the DEMO with sparkles and swirling acrylic resin. Enjoy watching your ink color of choice slosh around the massive 3.5mL capacity of this eyedropper filling fountain pen. Engineered for serious fountain pen enthusiasts who love to use their pens to write at extreme length, the Opus 88 Demonstrator is one of the few modern pens to feature an eyedropper filling only system that has a shut-off valve. More commonly found in Japanese vintage fountain pens, the valve regulates the ink flow to prevent ink burping on the page.\u003c\/p\u003e\u003cp\u003eOpus 88 Demo Eyedropper Filling Fountain Pen Details:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBarrel and Cap crafted from acrylic resin with swirls of white, light blue and dark blue\u003c\/li\u003e\n\u003cli\u003eNib: Stainless steel #6 nib with plastic feed\u003c\/li\u003e\n\u003cli\u003eFilling System: Eyedropper (includes glass eyedropper) with shut-off valve to safeguard against leakage.\u003c\/li\u003e\n\u003cli\u003ePen Length Closed: 5.63 in. \/ 143mm\u003c\/li\u003e\n\u003cli\u003ePen Body Max Diameter: 0.63 in. \/ 15.9mm\u003c\/li\u003e\n\u003cli\u003ePen Total Weight: .9 oz \/ 23g\u003c\/li\u003e\n\u003cli\u003eInk Capacity: ~3.5ml\u003c\/li\u003e\n\u003cli\u003eGift boxed with an instruction booklet and eyedropper\u003c\/li\u003e\n\u003cli\u003eMade in Taiwan\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style='margin: 0px 0px 1em; line-height: 1.4; font-family: \"Helvetica Neue\", Helvetica, Arial, sans-serif;'\u003e \u003c\/p\u003e","brand":"Opus 88 Pens","offers":[{"title":"Medium","offer_id":41592725176459,"sku":"23091801M","price":140.0,"currency_code":"USD","in_stock":false},{"title":"Fine","offer_id":41592725209227,"sku":"23091801F","price":140.0,"currency_code":"USD","in_stock":true},{"title":"Extra Fine","offer_id":41592725241995,"sku":"23091801EF","price":140.0,"currency_code":"USD","in_stock":true},{"title":"Broad","offer_id":41592725274763,"sku":"23091801B","price":140.0,"currency_code":"USD","in_stock":true},{"title":"1.5mm Stub","offer_id":41592725307531,"sku":"230918011.5","price":140.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1693\/8459\/files\/opus-88-demonstrator-fountain-pen-in-sapphire-397.jpg?v=1762271575"},{"product_id":"opus-88-koloro-demonstrator-fountain-pen-in-pink-pvd-2024","title":"Opus 88 Demonstrator Fountain Pen in Pink PVD 2024","description":"\u003cp\u003eThe Opus 88 Demonstrator fountain pens showcase vibrant color combinations within the classic true eyedropper design. Crafted from solid bar stock, each pen features a #6 stainless steel nib.\u003c\/p\u003e\n\u003cp\u003eThe 2024 special edition has a juicy appeal, contrasting translucent light pink resin with a purple grip, blind cap, and a bold deep green cap finial. Opus finished the pocket clip and stainless steel #6 size nib in black PVD.\u003c\/p\u003e\n\u003cp\u003eWith a capacity of 4ml, the demonstrator fountain pen incorporates a central rod that regulates ink flow and prevents leakage from the nib or feed during travel or periods of inactivity. Its screw-down valve effectively seals the ink within the barrel, enhancing safety in both usage and transportation compared to other eyedropper-filled pens.\u003c\/p\u003e\n\u003cp\u003ePresented in a gift box, the Opus 88 2024 Demonstrator fountain pen includes a glass dropper for easy filling.\u003c\/p\u003e\n\u003cp\u003eOpus 88 Demonstrator Fountain Pen in Pink 2024 Specifications\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePen Material: Resin.\u003c\/li\u003e\n\u003cli\u003eNib: Stainless steel #6 nib; PVD Black Nib\u003c\/li\u003e\n\u003cli\u003eTrim: PVD Black trim\u003c\/li\u003e\n\u003cli\u003eFilling System: Eyedropper (includes glass eyedropper) with shut-off valve to safeguard against leakage.\u003c\/li\u003e\n\u003cli\u003ePen Length Closed: 5.8 in. \/147.3mm\u003c\/li\u003e\n\u003cli\u003ePen Length Open (Cap Off): 5.44 in. \/ 138.2mm\u003c\/li\u003e\n\u003cli\u003ePen Cap Length: 2.5 in. \/ 63.5mm\u003c\/li\u003e\n\u003cli\u003ePen Body Max Diameter: 0.58 in. \/ 14.7mm\u003c\/li\u003e\n\u003cli\u003ePen Grip Section Diameter: 0.48 in. \/ 12.2mm\u003c\/li\u003e\n\u003cli\u003ePen Total Weight: 0.9 oz \/ 25.51g\u003c\/li\u003e\n\u003cli\u003eInk Capacity: ~3.5ml - 4ml\u003c\/li\u003e\n\u003cli\u003eGift boxed with instruction booklet\u003c\/li\u003e\n\u003cli\u003eMade in Taiwan\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Opus 88 Pens","offers":[{"title":"Medium","offer_id":41934076674187,"sku":"2401002M","price":140.0,"currency_code":"USD","in_stock":true},{"title":"Fine","offer_id":41934076706955,"sku":"2401002F","price":140.0,"currency_code":"USD","in_stock":true},{"title":"Extra Fine","offer_id":41934076739723,"sku":"2401002EF","price":140.0,"currency_code":"USD","in_stock":false},{"title":"Broad","offer_id":41934076772491,"sku":"2401002B","price":140.0,"currency_code":"USD","in_stock":true},{"title":"1.5mm Stub","offer_id":41934076805259,"sku":"24010021.5","price":140.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1693\/8459\/files\/opus-88-koloro-demonstrator-fountain-pen-in-pink-pvd-2024-158.jpg?v=1762271942"},{"product_id":"opus-88-demonstrator-fountain-pen-in-blue-whale","title":"Opus 88 Demonstrator Fountain Pen in Blue Whale","description":"\u003cp\u003eConceived from the life of the blue whale, a symbol of hope. The printing difficulty of this pen is very high. You can know the difficulty of printing from the continuous patterns on the upper and lower tubes. The blue whale’s energy symbolizes the sacred heart in us. Having been driven to the brink of extinction, blue whales have a brutal and bloody history.  They symbolize humanity’s power to shape a sustainable future.\u003c\/p\u003e\r\n\u003cp\u003eEnjoy watching your ink color of choice slosh around the massive 3.5mL capacity of this eyedropper filling fountain pen. Engineered for serious fountain pen enthusiasts who love to use their pens to write at extreme length, the Opus 88 Demonstrator is one of the few modern pens to feature an eyedropper filling only system that has a shut-off valve. More commonly found in Japanese vintage fountain pens, the valve regulates the ink flow to prevent ink burping on the page.\u003c\/p\u003e\u003cp\u003eOpus 88 Demo Eyedropper Filling Fountain Pen Details:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBarrel and Cap crafted from acrylic resin with swirls of blue and hand painted artwork\u003c\/li\u003e\n\u003cli\u003eNib: Stainless steel #6 nib with plastic feed\u003c\/li\u003e\n\u003cli\u003eFilling System: Eyedropper (includes glass eyedropper) with shut-off valve to safeguard against leakage.\u003c\/li\u003e\n\u003cli\u003ePen Length Closed: 5.63 in. \/ 143mm\u003c\/li\u003e\n\u003cli\u003ePen Body Max Diameter: 0.63 in. \/ 15.9mm\u003c\/li\u003e\n\u003cli\u003ePen Total Weight: .9 oz \/ 23g\u003c\/li\u003e\n\u003cli\u003eInk Capacity: ~3.5ml\u003c\/li\u003e\n\u003cli\u003eGift boxed with an instruction booklet and eyedropper\u003c\/li\u003e\n\u003cli\u003eMade in Taiwan\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style='margin: 0px 0px 1em; line-height: 1.4; font-family: \"Helvetica Neue\", Helvetica, Arial, sans-serif;'\u003e \u003c\/p\u003e","brand":"Opus 88 Pens","offers":[{"title":"Elastic Fine","offer_id":42133372502155,"sku":"240301-FLF","price":150.0,"currency_code":"USD","in_stock":false},{"title":"Elastic Extra Fine","offer_id":42133372534923,"sku":"240301-FLEF","price":150.0,"currency_code":"USD","in_stock":false},{"title":"Medium","offer_id":42133372567691,"sku":"240300-M","price":150.0,"currency_code":"USD","in_stock":false},{"title":"Fine","offer_id":42133372600459,"sku":"240300-F","price":150.0,"currency_code":"USD","in_stock":true},{"title":"Extra Fine","offer_id":42133372633227,"sku":"240300-EF","price":150.0,"currency_code":"USD","in_stock":true},{"title":"Broad","offer_id":42133372665995,"sku":"240300-B","price":150.0,"currency_code":"USD","in_stock":true},{"title":"1.5mm Stub","offer_id":42133372698763,"sku":"240300-1.5","price":150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1693\/8459\/files\/opus-88-demonstrator-fountain-pen-in-blue-whale-749.jpg?v=1762272108"},{"product_id":"opus-88-demonstrator-fountain-pen-in-mocha-mousse-pvd-2025","title":"Opus 88 Demonstrator Fountain Pen in Mocha Mousse PVD 2025","description":"\u003cp\u003eThe Opus 88 Demonstrator fountain pens continue to elevate the eyedropper tradition with fresh and unexpected color combinations. Precision-machined from solid bar stock resin, each pen features a reliable #6 stainless steel nib and a high-capacity ink chamber designed for serious writers and pen enthusiasts alike.\u003c\/p\u003e \u003cp\u003eFor 2025, Opus introduces the *Mocha Mousse* special edition—an elegant, dessert-inspired palette. Translucent warm beige resin is accented by a rich cocoa brown grip and blind cap, while the top finial is finished in a subtle almond hue. The clip and #6 stainless steel nib are treated with black PVD for a modern, cohesive aesthetic.\u003c\/p\u003e \u003cp\u003eThe eyedropper-filled barrel holds a generous 4ml of ink, regulated by a central shut-off valve system. This rod-and-valve mechanism ensures controlled ink flow and prevents leakage during travel or extended storage, making it a more secure and reliable alternative to traditional eyedropper pens.\u003c\/p\u003e \u003cp\u003eThe Opus 88 Demonstrator in Mocha Mousse is beautifully boxed and includes a glass eyedropper for easy filling.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eOpus 88 Demonstrator Fountain Pen in Mocha Mousse 2025 Specifications\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePen Material: Resin\u003c\/li\u003e \u003cli\u003eNib: Stainless steel #6 nib; Black PVD finish\u003c\/li\u003e \u003cli\u003eTrim: Black PVD-plated trim\u003c\/li\u003e \u003cli\u003eFilling System: Eyedropper (includes glass eyedropper) with shut-off valve to prevent leakage\u003c\/li\u003e \u003cli\u003ePen Length Closed: 5.8 in. \/ 147.3mm\u003c\/li\u003e \u003cli\u003ePen Length Open (Cap Off): 5.44 in. \/ 138.2mm\u003c\/li\u003e \u003cli\u003ePen Cap Length: 2.5 in. \/ 63.5mm\u003c\/li\u003e \u003cli\u003ePen Body Max Diameter: 0.58 in. \/ 14.7mm\u003c\/li\u003e \u003cli\u003ePen Grip Section Diameter: 0.48 in. \/ 12.2mm\u003c\/li\u003e \u003cli\u003ePen Total Weight: 0.9 oz \/ 25.51g\u003c\/li\u003e \u003cli\u003eInk Capacity: ~3.5ml – 4ml\u003c\/li\u003e \u003cli\u003eGift boxed with instruction booklet\u003c\/li\u003e \u003cli\u003eMade in Taiwan\u003c\/li\u003e \u003c\/ul\u003e","brand":"Opus 88 Pens","offers":[{"title":"Medium","offer_id":43563377721483,"sku":"250401M","price":150.0,"currency_code":"USD","in_stock":true},{"title":"Fine","offer_id":43563377754251,"sku":"250401F","price":150.0,"currency_code":"USD","in_stock":true},{"title":"Extra Fine","offer_id":43563377787019,"sku":"250401EF","price":150.0,"currency_code":"USD","in_stock":true},{"title":"Elastic Fine","offer_id":43563377819787,"sku":"250401FF","price":150.0,"currency_code":"USD","in_stock":true},{"title":"Elastic Extra Fine","offer_id":43563377852555,"sku":"250401EFF","price":150.0,"currency_code":"USD","in_stock":true},{"title":"Broad","offer_id":43563377885323,"sku":"250401B","price":150.0,"currency_code":"USD","in_stock":true},{"title":"1.5mm Stub","offer_id":43563377918091,"sku":"2504011.5","price":150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1693\/8459\/files\/opus-88-demonstrator-fountain-pen-in-mocha-mousse-pvd-2025-258.jpg?v=1759270362"},{"product_id":"opus-88-12-replacement-fountain-pen-nib-in-black-pvd","title":"Opus 88 Replacement Fountain Pen Nib in Black PVD #12 Jowo","description":"\u003cp\u003eUpgrade or replace your fountain pen nib with the Opus 88 #12 Replacement Nib in a sleek Black PVD finish. Crafted from durable stainless steel and coated with a smooth black physical vapor deposition (PVD) layer, this nib offers both reliability and a modern, understated look.\u003c\/p\u003e\n\u003cp\u003eDesigned for smooth, expressive writing, this nib unit delivers excellent ink flow and flexibility for line variation. It comes as a complete unit, including the nib, feed, and housing for easy installation.\u003c\/p\u003e\n\u003cp\u003eThis nib is available in Flex Extra Fine (EF) and Flex Fine (F), making it ideal for fountain pen users who want line variation and a more expressive writing experience while restoring or customizing their Opus 88 pen. It is designed for use with Opus 88 Sapphire and the 2024 Pink and Green Demo models that take PVD nib sections.\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan data-sheets-root=\"1\"\u003eOpus 88 Replacement Fountain Pen Nib in Black PVD #12 Jowo \u003c\/span\u003eSpecifications\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSize: #12 nib\u003c\/li\u003e\n\u003cli\u003eMaterial: Stainless steel\u003c\/li\u003e\n\u003cli\u003eFinish: Black PVD \u003c\/li\u003e\n\u003cli\u003eNib Types Available: Flex Extra Fine (EF), Flex Fine (F)\u003c\/li\u003e\n\u003cli\u003eIncluded Components: Nib, feed, and housing (complete unit)\u003c\/li\u003e\n\u003cli\u003eInstallation: Screw-in replacement nib unit\u003c\/li\u003e\n\u003cli\u003eCompatibility: Designed for Opus 88 Sapphire and 2024 Pink \u0026amp; Green Demo models that use PVD nib sections\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Opus 88 Pens","offers":[{"title":"Elastic Fine","offer_id":47150703607947,"sku":"961207BFL-F","price":30.0,"currency_code":"USD","in_stock":false},{"title":"Elastic Extra Fine","offer_id":47150703640715,"sku":"961206BFL-EF","price":30.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1693\/8459\/files\/169778e8-5c17-4ef9-b17f-e92e9a6a7274.jpg?v=1780948224"},{"product_id":"opus-88-12-replacement-fountain-pen-nib-in-stainless-steel","title":"Opus 88 Replacement Fountain Pen Nib in Stainless Steel #12 Jowo","description":"\u003cp\u003eUpgrade or replace your fountain pen nib with the Opus 88 #12 Replacement Fountain Pen Nib, designed for a smooth and reliable writing experience. Crafted from durable stainless steel, this nib delivers consistent ink flow and dependable everyday performance, making it ideal for both writing and restoring your pen. It comes as a complete unit including the nib, feed, and housing for easy installation.\u003c\/p\u003e\n\u003cp\u003eThis replacement nib is available in a variety of tip sizes including Extra Fine (EF), Fine (F), Medium (M), Broad (B), 1.5mm Stub, Flex Extra Fine, and Flex Fine, allowing you to choose the writing style that best suits your preference. These #12 nib sections are compatible with Opus 88 Demo, Omar, and Jazz fountain pens.\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan data-sheets-root=\"1\"\u003eOpus 88 Replacement Fountain Pen Nib in Stainless Steel #12 Jowo \u003c\/span\u003eSpecifications\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSize: #12 nib\u003c\/li\u003e\n\u003cli\u003eMaterial: Stainless steel\u003c\/li\u003e\n\u003cli\u003eFinish: Silver (standard stainless steel finish)\u003c\/li\u003e\n\u003cli\u003eNib Types Available: Extra Fine (EF), Fine (F), Medium (M), Broad (B), 1.5mm Stub, Flex Extra Fine, Flex Fine\u003c\/li\u003e\n\u003cli\u003eIncluded Components: Nib, feed, and housing (complete unit)\u003c\/li\u003e\n\u003cli\u003eInstallation: Screw-in replacement nib unit\u003c\/li\u003e\n\u003cli\u003eCompatibility: Opus 88 Demo, Omar, and Jazz fountain pens\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Opus 88 Pens","offers":[{"title":"Elastic Fine","offer_id":47150710063243,"sku":"96091302","price":20.0,"currency_code":"USD","in_stock":false},{"title":"Elastic Extra Fine","offer_id":47150710096011,"sku":"96091301","price":20.0,"currency_code":"USD","in_stock":false},{"title":"1.5mm Stub","offer_id":47150710128779,"sku":"96091205","price":20.0,"currency_code":"USD","in_stock":false},{"title":"Broad","offer_id":47150710161547,"sku":"96091204","price":20.0,"currency_code":"USD","in_stock":false},{"title":"Medium","offer_id":47150710194315,"sku":"96091203","price":20.0,"currency_code":"USD","in_stock":false},{"title":"Fine","offer_id":47150710227083,"sku":"96091202","price":20.0,"currency_code":"USD","in_stock":false},{"title":"Extra Fine","offer_id":47150710259851,"sku":"96091201","price":20.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1693\/8459\/files\/7d869ccc-2e43-43ee-a471-05a8cb7f914f.png?v=1780948350"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1693\/8459\/collections\/opus-88-demonstrator.webp?v=1722616999","url":"https:\/\/goldspot.mom\/collections\/opus-88-demonstrator.oembed","provider":"Goldspot Pens","version":"1.0","type":"link"}