Uni-ball ONE Gel Pen | 0.5mm Yellow | Japanese Ballpoint Pen

The Mitsubishi Uni-ball ONE is a Japanese-engineered gel pen celebrated for its advanced pigment ink technology and smooth, consistent performance. With a precise 0.5mm tip and rich black ink, the ONE delivers bold, vibrant lines that dry quickly and resist smudging — housed in a sunny yellow body that brightens up any desk or pen case.

• Tip size: 0.5mm
• Ink colour: Black
• Body colour: Yellow
• Ink type: Advanced pigment gel — bold, quick-drying, smudge- and bleed-resistant
• Refill: Compatible with UMR-05S (shared across the Uni-ball ONE series)
• Origin: Japan
• Ideal for: Everyday writing, note-taking, journaling, and office use

Clean, reliable, and built to impress — the Uni-ball ONE in yellow is the everyday essential for anyone who takes their writing seriously.