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Uni-ball One Gel Black Body Pen - 0.38 & 0.5 mm
Uni-ball One Gel Black Body Pen - 0.38 & 0.5 mm
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- The Uni-ball One Gel Pen is a premium writing instrument designed for those who seek precision, smooth ink flow, and a sophisticated writing experience.
- Whether you're taking notes, journaling, or sketching, this pen delivers exceptional performance with its high-quality gel ink formula.
- Featuring Uni-ball’s exclusive pigment-based gel ink, the Uni-ball One provides darker, richer, and more vibrant black ink compared to standard gel pens.
- The ink sits on the paper surface instead of soaking in, preventing smudging and ensuring fast drying.
- This makes it an excellent choice for students, professionals, and artists who require clean, precise writing with minimal feathering or bleed-through.
- The sleek, modern body design enhances both style and functionality. A low center of gravity offers better balance, making long writing sessions more comfortable and reducing hand fatigue.
- The matte-finish body provides a premium feel, while the sturdy clip-on cap ensures easy portability.
- 0.5mm Tip – Perfect for everyday writing, offering smooth ink flow and medium boldness.
- 0.38mm Tip – Ideal for fine details, precise note-taking, and intricate sketches.

Its exceptional pen with deep black ink, does not skip much. Worth buying. Shipping was fast
Uniball one is the best and brightest black ink i have seen. Compared to zento in terms and brightness of price uniball one still holds the ground for me. Hope we do get the refill stocked. Overall the service from bumbo is great and they even me edit a mistake in my order. Thanks to the team.
It's a awesome pen and the black ink is darkest I've seen till now...
Just 1 COMPLAINT and that is - "Restocking".. Items especially Pens and Refills are not restocked quickly ,, I'm eagerly waiting for Pentel EnerGel pens and also Refills of Uni Ball One & Pentel EnerGel pens....
So they should improve their restocking capacity..