{"product_id":"uni-ball-signo-umr85n-gel-refill-05mm-box-10","title":"Uni-ball Signo UMR-85N Gel Refill 0.5mm Box of 10 Japan","description":"\u003ch2\u003eUni-ball Signo UMR-85N Gel Ink Refill — 0.5mm, Box of 10, Japan\u003c\/h2\u003e\n\n\u003cp\u003eThe official replacement refill for Uni-ball Signo RT retractable gel pens — UMN-105, UMN-155-05, UMN-152, and compatible bodies. Ten refills per box, three ink colours, one quality standard.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOfficial Signo RT Replacement — Fits UMN-105, UMN-155-05 \u0026amp; UMN-152:\u003c\/strong\u003e The UMR-85N is the official replacement refill for Uni-ball Signo RT retractable gel pens — a direct fit that restores each pen to its original writing performance without modification or adapter. If your Signo RT pen accepts a click-type (knock-style) refill, the UMR-85N is the correct replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGel Ink — 0.5mm, Waterproof \u0026amp; Fade-Resistant:\u003c\/strong\u003e Uni-ball’s gel ink formula delivers a smooth, consistent 0.5mm line that is waterproof once dry and fade-resistant over time — ink that holds through highlighter passes, damp conditions, and long-term archiving without feathering or bleeding on standard paper weights.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSkip-Free Flow — Consistent from First Use to Last Drop:\u003c\/strong\u003e Engineered for uninterrupted ink flow throughout the full refill cycle — no dry-out between sessions, no pressure variation, no inconsistency as the ink level drops. The same performance standard as the original factory refill, maintained through every replacement cycle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox of 10 — Classroom, Office \u0026amp; Exam Ready:\u003c\/strong\u003e Ten refills per box — the standard supply unit for students, teachers, and office users who write daily. Each refill is individually packaged in a retail sleeve with full specification details including model number, ball size, and ink colour. Stock the drawer before the first one runs out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree Ink Colours — Made in Japan:\u003c\/strong\u003e Available in Black (24 pcs\/box), Blue (33 pcs\/box), and Red (15 pcs\/box) — manufactured in Japan by Mitsubishi Pencil Co. to Uni-ball’s precision quality standard. Made in Japan.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhich Uni-ball pens does the UMR-85N fit?\u003c\/strong\u003e\u003cbr\u003eThe UMR-85N is compatible with Uni-ball Signo RT UMN-105, UMN-155-05, UMN-152, and other Signo RT click-type (knock-style) pen bodies. Check your pen’s packaging or barrel for the compatible refill model.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs the UMR-85N the same as the UMR-85?\u003c\/strong\u003e\u003cbr\u003eThe UMR-85N is the updated version of the UMR-85, designed specifically for knock-style (click retractable) Signo RT pens. Always check your pen model to confirm compatibility before purchasing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow many refills are in a box?\u003c\/strong\u003e\u003cbr\u003eEach box contains 10 individually packaged refills in your chosen ink colour — Black, Blue, or Red.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this refill waterproof?\u003c\/strong\u003e\u003cbr\u003eYes. Uni-ball’s gel ink is waterproof once dry and fade-resistant over time — suitable for documents, journals, and any writing intended to last.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhere is this refill made?\u003c\/strong\u003e\u003cbr\u003eMade in Japan by Mitsubishi Pencil Co. Each refill is manufactured to Uni-ball’s Japanese quality standard and marked accordingly on the individual retail packaging.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e UNI-REFILL-UMR85N\u003c\/p\u003e","brand":"Uni-ball","offers":[{"title":"Black","offer_id":55205200527732,"sku":"UNI-REFILL-UMR85N-1","price":12.5,"currency_code":"GBP","in_stock":true},{"title":"Red","offer_id":55205200560500,"sku":"UNI-REFILL-UMR85N-2","price":12.5,"currency_code":"GBP","in_stock":true},{"title":"Blue","offer_id":55205200593268,"sku":"UNI-REFILL-UMR85N-3","price":12.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0957\/5727\/1412\/files\/1000018382.jpg?v=1787214308","url":"https:\/\/www.ttpen.co.uk\/products\/uni-ball-signo-umr85n-gel-refill-05mm-box-10","provider":"TTPEN UK","version":"1.0","type":"link"}