Uni-ball One P Gel Pen Black Ink

The One P is the One F's shorter, chunkier sibling — same ink, same spring-loaded clip, same satisfying write, in a more pocket-friendly format. At 11.7cm it slips easily into a planner, pen case, or jacket pocket without the barrel sticking out.

The ink is Uni-ball's pigment-based gel: formulated to sit on the surface of the paper rather than soaking in, which means a genuinely deep, rich black rather than the washed-out grey you get from lesser gel pens. Fast-drying, water-resistant and fade-resistant — reliable across notebooks, planners and most everyday paper.

The barrel is slightly wider than a standard slim pen, which improves balance and reduces hand fatigue over longer writing sessions. A push-button retractable tip means no cap to lose. The sturdy clip attaches securely to notebooks, planners or pockets. Refillable with standard Uni-ball gel refills.

Also available: the One F — full-length version, same ink.

By Uni Mitsubishi, made in Japan.

Specifications:

• Ink: Black pigment gel, water-resistant, fade-resistant, fast-drying
• Tip sizes: 0.38mm or 0.5mm
• Tip: Retractable push-button
• Clip: Spring-loaded metal
• Length: 11.7cm
• Diameter: 14mm
• Refillable: Yes (Uni-ball gel refills)