Uni-ball Signo UM-151 Gel Ink Pen - 0.38 mm - 8 Color Set

In stock and ships within 1 business day.
4.6 (9 reviews)
This set contains 8 colors: Black, Blue, Red, Violet, Light Blue, Pink, Orange, and Green.

Uni-ball Signo gel ink pens are known for their smooth writing and exceptional ink quality. And, to everyone's delight, there is a sea of colors and tip sizes to choose from. Find the perfect pen for any task, whether it's writing meticulous notes, marking your calendar, or decorating your scrapbook with colorful captions.

Everything about this pen, from its solid construction to its carefully-formulated ink, ensures a wonderful writing experience. The sturdy tip does not bend or break, even with heavy-handed use. The pigment-based ink flows smoothly and is waterproof, fade-resistant, and feather-resistant. Much of that is due to special viscous properties of the ink. The ink is viscous while in the barrel, but as it passes through the pen tip during writing, the viscosity drops. This results in smooth ink flow. Immediately after it hits the paper, the ink returns to its viscous state, which prevents feathering. You are left with beautiful clean lines that you can enjoy for a long time!

Note: The Pink ink color is almost fluorescent. It is brighter than what we are able to show in the writing sample photos.

Model NumberUNI UM151 8SET
Weight4.0 ounces
Body Color Clear
Body Material Plastic
Clip Material Plastic
Clippable Yes
Color Set Yes
Diameter - Grip 10.2 mm
Diameter - Max 10.2 mm
Grip Color Black, Blue, Red, Purple, Light Blue, Pink, Orange, Green
Grip Material Rubber
Ink Characteristics Waterproof
Ink Refillable Yes
Length - Capped 13.8 cm
Length - Posted 15.3 cm
Length - Uncapped 13.1 cm
Mechanism Capped
Pre-Installed Ink Color Black, Blue, Red, Violet, Light Blue, Pink, Orange, Green
Tip Length 4.3 mm
Tip Material Metal
Tip Size 0.38 mm
Tip Type Conical

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Customer Reviews

I love UM-151. Just one...
July 9, 2012
I love UM-151. Just one thing I really don't understand, though. These guys are $2.5 each, and if my math is correct, if I buy 8 it should be $20. Now this set is actually $1 more expensive!! Shouldn't it be the same price, if not cheaper?
4 people found this helpful
I bought this set for...
January 22, 2015
Verified Purchase
I bought this set for my husband to use for highly detailed maps that he draws. He needed a very fine line but with vibrant color. The pens are perfect for what he's working on, and I'd recommend them to anyone looking for a fine line gel pen. We're both interested to see how long the pens last, we've had problems with some other brands of gel pens rapidly running out of ink.
I've had a limited edition...
August 16, 2014
I've had a limited edition pink Uni-ball Signo UM pen with me (exactly the same like this pen, but has a polka-dot design) and it survived for a LOOONG time. These pens are my favorite, as they have an excellent quality.

- Smooth and easy writing
- Comfortable grip
- Even though it's stated as a 'gel pen' it doesn't smear, smudge, and dries quickly
- Waterproof
- Ink color is vivid and matches the pen color (I hate it when colors are lighter than how they looked like!)
- Doesn't bleed
- Long pen lifespan. No, really :p

- Expensive; for me, but it's WORTH IT.

I've been a big fan of...
August 8, 2012
Verified Purchase
I've been a big fan of the Hi-Tec C (0.4mm) pens ever since I laid my hands on them. Compared to the Hi-Tec C pens, however, the Uni-ball (DX) UM-151 (0.38mm) is much thinner compared to the Hi-Tec C. I personally love how smooth these pens can write without any scratch noise. In addition, IT'S WATERPROOF! The Hi-Tec C pens are not waterproof (one drop of water can mess up the ink on paper).

I gave a Hi Tec C pen for my boyfriend last year and he broke the tip of it. I bought these pens this year for him and he said he absolutely loved it (better than the Hi-Tec C).
I use these to draw what...
May 31, 2012
Verified Purchase
I use these to draw what I see with the microscope (histology). These colors are good for most of the stains I use, but replace the pink with "pure pink" to get a better set.

This ink does not run, even if I spill alcohol or water on a drawing - which happens a lot more often than it should.

I highly recommend these for laboratory use.