uniball 150 Eye Ultra Micro Rollerball Pen 0.38mm Fine Tip, Blue Ink, Precise Lines, Waterproof & Fade-Resistant Ink - Pack of 12

The 0.38mm tip delivers extremely fine lines, making it ideal for technical writing, detailed diagrams, annotations, small handwriting, and precision note-taking. It’s less suited for broad, bold strokes.

The pen uses blue ink that is waterproof and fade-resistant, helping your documents stay legible over time and resisting smudging on typical paper.

This pen is great for students, designers, engineers, planners, and professionals who need clean, fine lines for diagrams, charts, and precise notes.

- Ultra Micro 0.38mm tip for fine lines; - Blue waterproof ink with fade resistance; - Consistent ink flow for uniform lines; - Sleek, professional design; - Cap with pocket clip for portability; - Reputable Uni-ball quality for everyday writing.

This item is typically sold as a disposable 12-pack. Refill options for the exact Ultra Micro 0.38mm model aren’t common; you’ll usually replace with a new pen or another pack when the ink runs out.

If you’re weighing options on Fepy, you can consider: 1) Uni-ball Signo RT1 Gel Pen (0.5mm) in blue for a slightly broader line with gel ink: https://fepy.com/product/uniball-signo-rt1-0-5mm-blue-gel-pen; 2) Uni-ball Vision Elite Rollerball (0.7mm) in blue for smoother, thicker lines: https://fepy.com/product/uniball-vision-elite-rollerball-0-7mm-blue.

Yes. The cap with a pocket clip makes it portable and reduces the chance of ink leakage when carried in a bag or notebook. Close the cap when not in use to prevent drying.

The blue ink is fade- and water-resistant, designed to be durable for long-term documents. While not a pigment-based archival ink, it is intended for lasting legibility on standard paper.

It performs well on standard office paper, notebooks, planners, and other common writing surfaces. It may not produce ideal results on glossy or specially coated stock.

Write with light, consistent pressure, keep the pen at a comfortable angle, and store it capped when not in use. If you notice a skip at first use, a few gentle, light strokes on scrap paper can prime the tip.

The 12-pack offers value and convenience—backups ready for classrooms, offices, or workspaces, ensuring you don’t run out mid-project while enjoying reliable Uni-ball quality and consistent line quality.