{"product_id":"opus-88-12-replacement-fountain-pen-nib","title":"Opus 88 #12 Replacement Fountain Pen Nib — JoWo #6 Nib, Feed \u0026 Housing","description":"\u003ch3 dir=\"ltr\" class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eA Drop-In Nib Unit, Ready to Write\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe Opus 88 #12 is a complete replacement nib assembly, sized to the JoWo #6 standard — stainless steel nib, feed, and screw-in housing, sold as one unit rather than a bare nib. Swapping it into a compatible Opus 88 pen takes seconds: unscrew the existing nib section, thread this one in, and you're writing with a new line width or grind without sending the pen anywhere.\u003c\/p\u003e\n\u003ch4 dir=\"ltr\" class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eFit \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThis nib unit fits Opus 88 pens built around the Jowo #6 housing, including the \u003cstrong\u003eDemonstrator\u003c\/strong\u003e, \u003cstrong\u003eDemonstrator Yellow\u003c\/strong\u003e, \u003cstrong\u003eJazz\u003c\/strong\u003e (Demonstrator and Solid Color), \u003cstrong\u003eOmar\u003c\/strong\u003e (2020 and Demonstrator), \u003cstrong\u003eHeart Sutra\u003c\/strong\u003e, and \u003cstrong\u003eSonata\u003c\/strong\u003e. Because it uses the standard JoWo #6 threading, it also fits many other JoWo-compatible fountain pens beyond the Opus 88 line.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e this housing does \u003cstrong\u003enot\u003c\/strong\u003e fit the Opus 88 Bela, Flora, or Flow — those models use a different nib mount. Check your pen model before ordering.\u003c\/p\u003e\n\u003ch4 dir=\"ltr\" class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eWhat's Included\u003c\/h4\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eEach nib unit comes complete with the stainless steel nib, feed, and threaded housing — plus a small spare O-ring seal for the section threads, and its own compact gift box for safe storage of nibs you're not currently using.\u003c\/p\u003e\n\u003ch4 dir=\"ltr\" class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eAvailable Sizes at Shosai\u003c\/h4\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eWe carry the Opus 88 #12 in:\u003c\/p\u003e\n\u003cul dir=\"ltr\" class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eFine (F)\u003c\/strong\u003e — the most versatile everyday width\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eMedium (M)\u003c\/strong\u003e — broader and wetter, good for shading inks\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eBroad (B)\u003c\/strong\u003e — a bold, generous line\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003e1.5 mm Stub\u003c\/strong\u003e — an italic-style grind for crisp line variation\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eFlex Extra Fine\u003c\/strong\u003e — a responsive nib that widens under pressure, fine at rest\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eFlex Fine\u003c\/strong\u003e — the same flexible response with a slightly broader baseline\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cem\u003eExtra Fine (EF) exists in the Opus 88 #12 line but is not currently in stock at Shosai — reach out if you'd like us to source it.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch4 dir=\"ltr\" class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eAt Shosai\u003c\/h4\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eEvery nib is inspected before it leaves our Gatineau boutique. Available in-store and online, serving the Ottawa–Gatineau National Capital Region with shipping across Canada. If you're unsure which width or grind is right for your pen or your handwriting, we're happy to help you choose.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cem\u003eBilingual service — English and French.\u003c\/em\u003e\u003c\/p\u003e","brand":"Opus 88","offers":[{"title":"Extra Fine (EF)","offer_id":48835797319905,"sku":"96091201","price":39.99,"currency_code":"CAD","in_stock":false},{"title":"Fine (F)","offer_id":48835797352673,"sku":"96091202","price":39.99,"currency_code":"CAD","in_stock":true},{"title":"Medium (M)","offer_id":48835797385441,"sku":"96091203","price":39.99,"currency_code":"CAD","in_stock":true},{"title":"Broad (B)","offer_id":48835797418209,"sku":"96091204","price":39.99,"currency_code":"CAD","in_stock":true},{"title":"Stub 1.5mm","offer_id":48835797450977,"sku":"96091205","price":39.99,"currency_code":"CAD","in_stock":true},{"title":"Flex Extra Fine (Flex EF)","offer_id":48835797483745,"sku":"96091301","price":49.99,"currency_code":"CAD","in_stock":true},{"title":"Flex Fine (Flex F)","offer_id":48835797516513,"sku":"96091302","price":49.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0806\/8032\/1249\/files\/1_7a08a79a-dcd4-47bf-a514-75c5ac9d5811.png?v=1785603008","url":"https:\/\/shosai.ca\/products\/opus-88-12-replacement-fountain-pen-nib","provider":"Shosai","version":"1.0","type":"link"}