Uni-ball Signo RT UMN-105 Sampler 5-Pen Set Japan

Uni-ball Signo RT UMN-105 — Try-Before-You-Commit Sampler Set, 5 Pens (3 Black + 1 Blue + 1 Red), 0.5mm, Japan

The UMN-105 is one of Japan’s most trusted retractable gel pens. This sampler set gives you five pens across three ink colours — three black for daily writing, one blue for annotation and correspondence, one red for correction and emphasis — so you can experience the full Signo RT writing range before committing to a full box.

• 5-Pen Sampler — 3 Black, 1 Blue, 1 Red: The most practical colour ratio for a desk or pencil case — three black pens cover daily writing, exams, and note-taking; one blue covers correspondence and annotation; one red covers correction, marking, and emphasis. A complete writing toolkit in a single purchase, sized for a bag rather than a storeroom.
• Water-Based Pigment Gel Ink — 0.5mm, Waterproof & Fade-Resistant: Uni-ball’s water-based pigment gel ink 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.
• Steel Needle Tip — Precision Sightline, Clean 0.5mm Line: The stainless steel needle tip provides a clear sightline to the writing point, making it easier to write precisely along ruled lines, fill in answer boxes, and annotate tight margins — a practical advantage for exam writers and anyone who needs to place every character accurately under time pressure.
• Rubber Grip — Comfort & Control Through Long Sessions: The lower grip section is moulded in soft rubber that cushions finger pressure and reduces hand fatigue during extended writing sessions — a design detail that makes the UMN-105 the pen students and professionals reach for when they have hours of writing ahead of them.
• Refillable — Signo RT Platform, Made in Japan: Each pen is compatible with Uni-ball UMR-85 replacement refills — a pen body built to outlast its first refill by years. Manufactured in Japan to Uni-ball’s precision quality standard. The same pen trusted in classrooms and offices across Japan, now in a sampler set sized for first-time buyers.

Frequently Asked Questions

What is included in this sampler set?
The set contains 5 pens: 3 x Black (UMN-105-BK), 1 x Blue (UMN-105-BL), and 1 x Red (UMN-105-R) — all 0.5mm, all Signo RT platform.

Is this the same pen as the full box of 12?
Yes — identical pens, smaller quantity. The sampler set is designed for first-time buyers who want to try the UMN-105 before purchasing a full box of 12.

What refill does the UMN-105 use?
The UMN-105 is compatible with the Uni-ball UMR-85 gel ink refill (0.5mm). Refills are available separately in our store.

Is the ink waterproof?
Yes. Uni-ball’s water-based pigment gel ink is waterproof once dry and fade-resistant over time — suitable for documents, journals, and any writing intended to last.

Where is this pen made?
Made in Japan. Each pen is manufactured to Uni-ball’s Japanese quality standard and marked accordingly on the packaging.

SKU: UNI-GEL-UMN105-SAMPLER