Uni-ball Signo UMR-83 Gel Ink Pen Refill 0.38mm - Pack of 10 | Black, Blue, Red and Blue-Black | Compatible with UMN-155-38 UMN-103 | Japan Mitsubishi Pencil

Ultra-Fine Precision, Ten at a Time - Uni-ball Signo UMR-83 0.38mm Gel Refill

Introducing the Uni-ball Signo UMR-83 Gel Ink Pen Refill 0.38mm - the authentic Japan Mitsubishi Pencil replacement refill for the uni-ball Signo retractable gel pen series in the ultra-fine 0.38mm diameter. Available in four ink colours - Black, Blue, Red, and Blue-Black - each pack contains 10 refills in Mitsubishi Pencil's signature colour-coded hanging card format. Compatible with UMN-155-38, UMN-103, and all standard Signo retractable bodies marked as UMR-83 compatible.

• 4 Ink Colours - Black, Blue, Red and Blue-Black: Black for exams, professional documents, and everyday writing. Blue for notes, annotations, and colour-coded study systems. Red for marking, corrections, and emphasis. Blue-Black for sophisticated handwritten documents and signatures - reads as black in photocopies with a distinctive blue undertone. Each colour is presented in a matching colour-coded hanging card pack with the uni-ball Signo logo and UMR-83 model number.
• 0.38mm Ultra-Fine Ball - Sharper Than Standard 0.5mm: The UMR-83 delivers a 0.38mm ultra-fine gel ink line - significantly finer than the standard 0.5mm UMR-85N refill. The ultra-fine tip is ideal for small handwriting, dense study notes, detailed annotations, and any writing that demands maximum precision on ruled paper. A favourite among students who write small and fast, and professionals who need clean, precise lines in compact spaces.
• Compatible with Signo Retractable Bodies - UMN-155-38, UMN-103 and More: The UMR-83 is the standard replacement refill for Mitsubishi Pencil's Signo retractable gel pen range in the 0.38mm diameter - including the UMN-155-38 (Signo RT1 0.38mm) and UMN-103 (Signo RT 0.38mm). Simply click out the old refill and click in the new one - no tools, no mess, no waste.
• Uni-ball Signo Gel Ink - Smooth, Skip-Free, Water-Resistant: The UMR-83 uses Mitsubishi Pencil's premium Signo gel ink formula - smooth, consistent flow from first stroke to last, with no skipping, no blobbing, and no feathering on standard paper. Ink is water-resistant once dry, ensuring your notes and documents remain legible even if exposed to moisture.
• Japan Mitsubishi Pencil Authentic - Pack of 10, Better Value: Each pack contains 10 authentic Japan Mitsubishi Pencil UMR-83 refills in a convenient hanging card format - guaranteed genuine. Buying in a pack of 10 delivers significantly better value than single refills. Stock up in all four colours and never run dry at a critical moment.