{"product_id":"twsbi-eco-piston-filler-fountain-pen-plum-onyx","title":"TWSBI ECO Piston Filler Fountain Pen - Plum Onyx","description":"\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEdition:\u003c\/strong\u003e Plum Onyx — Special Edition featuring a rich, deep plum purple resin paired with sleek, stealthy onyx black plating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNib:\u003c\/strong\u003e \u003cstrong\u003eOnyx Black Steel\u003c\/strong\u003e — Precision Jowo stainless steel nib plated in dark onyx to perfectly match the trim\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilling Mechanism:\u003c\/strong\u003e Piston Filler — Internal piston draws ink directly into the barrel (approx. 1.76ml capacity)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInk Capacity:\u003c\/strong\u003e Massive — Holds nearly 4x more ink than a standard converter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e Crystal Clear — Transparent barrel allows you to see your ink level and color at all times\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintenance:\u003c\/strong\u003e Fully Serviceable — Includes wrench and silicone grease for home disassembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 139 mm capped, 168 mm posted — Hexagonal cap prevents rolling and posts securely\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in Taiwan — Precision engineered for durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eAbout the TWSBI ECO Piston Filler Fountain Pen – Plum Onyx\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eTWSBI ECO Piston Filler Fountain Pen – Plum Onyx\u003c\/strong\u003e is a striking Special Edition that brings a bold, modern edge to the reliable ECO lineup. Elevating the standard demonstrator design, this pen features a rich, deep \u003cstrong\u003ePlum purple\u003c\/strong\u003e cap and piston knob, beautifully contrasted by stealthy \u003cstrong\u003eOnyx black-plated trim\u003c\/strong\u003e and a matching dark onyx-plated nib.\u003c\/p\u003e\n\u003cp\u003eThe ECO (short for \"Economical\") is celebrated for bringing high-end \u003cstrong\u003episton filling mechanisms\u003c\/strong\u003e to an accessible price point. The built-in piston allows you to fill the pen directly from a bottle, holding a massive \u003cstrong\u003e1.76ml of ink\u003c\/strong\u003e. The crystal-clear barrel not only lets you monitor your ink level at a glance but also turns your ink of choice into a vibrant visual centerpiece against the dark, moody plum and black accents.\u003c\/p\u003e\n\u003cp\u003eDesigned for flawless daily use, the cap features an inner seal to prevent the nib from drying out, even if left unused for extended periods. The distinct hexagonal cap prevents the pen from rolling off your desk, while the smooth, round grip section ensures a remarkably comfortable writing experience.\u003c\/p\u003e\n\u003cp\u003eTrue to TWSBI’s philosophy of user empowerment, the pen arrives in a presentation box that includes a bespoke wrench and silicone grease, giving you the freedom to fully disassemble, clean, and lubricate the mechanism yourself—ensuring your tool lasts a lifetime.\u003c\/p\u003e","brand":"TWSBI","offers":[{"title":"Extra Fine EF","offer_id":48761870385369,"sku":"M7441440","price":55.0,"currency_code":"USD","in_stock":true},{"title":"Fine F","offer_id":48761870418137,"sku":"M7441450","price":55.0,"currency_code":"USD","in_stock":true},{"title":"Medium M","offer_id":48761870450905,"sku":"M7441460","price":55.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/1173\/3209\/files\/TWSBI_ECO_Piston_Filler_Fountain_Pen_-_Plum_Onyx.png?v=1779995684","url":"https:\/\/penandtool.com\/products\/twsbi-eco-piston-filler-fountain-pen-plum-onyx","provider":"Pen \u0026 Tool","version":"1.0","type":"link"}