Uni-ball Signo RT UMN-105 Gel Pen Set

Uni-ball Signo RT UMN-105 Gel Pen Set | 0.5mm | 5-Pack

Experience the legendary smoothness of Japanese gel ink. The Uni-ball Signo RT UMN-105 is trusted by students, professionals, and pen enthusiasts worldwide for its consistent, skip-free performance and ultra-fine 0.5mm tip.

This trial set of 5 pens lets you explore the full Signo RT color range — perfect for color-coded notes, everyday writing, or gifting.

What's Included

• 3 × Black (UMN-105)
• 1 × Blue (UMN-105)
• 1 × Red (UMN-105)

Key Features

• 0.5mm ultra-fine tip — precise, clean lines every time
• Retractable click mechanism — no cap to lose
• Super Ink formula — water-resistant, fade-resistant, forgery-resistant
• Smooth gel flow — reduces hand fatigue during long writing sessions
• Ergonomic grip zone — comfortable for extended use
• Made in Japan — premium quality control

Ideal For

• Students & note-takers
• Office & professional use
• Journaling & planners
• Pen collectors & stationery lovers

FAQ

Q: What ink colors are included in this set?

A: This trial set includes 3 black, 1 blue, and 1 red Uni-ball Signo RT UMN-105 pens — a practical everyday combination.

Q: What is the tip size?

A: All pens feature a 0.5mm fine tip, ideal for detailed writing, small text, and precise note-taking.

Q: Is the ink waterproof?

A: Yes. Uni-ball's proprietary Super Ink is water-resistant, UV-resistant, and designed to resist tampering — making it suitable for important documents.

Q: Are the ink refills replaceable?

A: Yes. The UMN-105 is compatible with UMN-105 refill cartridges, available separately.

Q: Is this an authentic Japanese product?

A: Yes. These are genuine Uni-ball (Mitsubishi Pencil Co.) products manufactured in Japan to the highest quality standards.

Q: How long does the ink last?

A: Under normal writing conditions, each pen provides approximately 300–400 meters of writing, depending on pressure and line thickness.