Uni-ball One 3 Multicolour Gel pen, 0.5mm, Shirt Blue

• THREE COLOURS, ONE PEN — carries black, red and blue uni-ball One gel ink in a single slim body, so you can colour-code notes, diaries and to-do lists without juggling three separate pens.
• TWIST-CLIP SELECTOR — simply rotate the clip until it lines up with the colour ring and the matching tip extends smoothly, keeping the barrel's clean, straight silhouette free of side buttons.
• BUILT FOR STEADY WRITING — 129 mm long with a slightly wider grip; a metal stabiliser at the tip base lowers the centre of gravity and reduces vibration for comfortable, fatigue-free writing sessions.
• CRISP, VIVID LINES — pigment-rich ink sits on the paper surface rather than soaking in, giving deeper blacks and brighter reds and blues that dry quickly and resist smudging in notebooks and planners.
• JAPANESE-MADE, REFILLABLE — each colour replaces individually with uni UMR-ML-05S 0.5 mm refills (sold separately), so one well-made pen keeps going; model UME3SR05.20 in the Brick Red finish.

The uni-ball One 3 brings the celebrated uni-ball One gel ink into a single three-colour pen, pairing black, red and blue in a compact Brick Red body designed for everyday use. Instead of carrying separate pens for colour-coded notes, you switch between all three colours in one hand. Colour selection works through the rotating clip: turn it until it meets the matching indicator on the colour ring and the corresponding 0.5 mm tip extends. The mechanism keeps the body's straight, minimal profile, while a metal stabiliser fitted at the base of the tip lowers the centre of gravity, steadying each stroke and reducing hand fatigue over long sessions. The ink is what sets the One series apart. Its pigment particles are engineered to stay on the surface of the paper rather than being absorbed, so blacks appear deeper and reds and blues more vivid, with fast drying and strong resistance to smudging and bleed-through. At 129 mm long with a slightly wider grip, the pen suits students, planners and anyone who organises information by colour. Each colour can be replaced individually with uni UMR-ML-05S 0.5 mm refills, sold separately. Made in Japan by Mitsubishi Pencil; model UME3SR05.8, Shirt Blue.