Uni-ball Signo UM-100 Gel Ink Pen - 0.5 mm - Blue Black

Uni-ball Signo UM-100 Gel Ink Pen - 0.5 mm - Blue Black

In stock and ships within 1 business day.
4.9 (14 reviews)
DescriptionSpecificationsFrequently Asked Questions
Get all the colors for the popular Uni UM-100 pen line!

Known for its smooth flowing ink and its writing performance, the UM-100 pens are top notch pens hidden in an economical body form.

Refills available!

Model NumberUNI UM100.64
Weight0.4 ounces
Body Color Clear
Body Material Plastic
Clip Material Plastic
Clippable Yes
Color Set No
Diameter - Grip 9.8 mm
Diameter - Max 9.8 mm
Grip Color Clear
Grip Material Plastic
Ink Refillable Yes
Length - Capped 15.1 cm
Length - Posted 16.9 cm
Length - Uncapped 14.0 cm
Mechanism Capped
Pre-Installed Ink Color Blue Black
Tip Length 4.4 mm
Tip Material Metal
Tip Size 0.5 mm
Tip Type Conical
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Frequently Bought Together

Uni-ball Signo UM-100 Gel Ink Pen - 0.5 mm - Blue Black - UNI UM100.64
Uni-ball Signo UM-100 Gel Ink Pen - 0.5 mm - Black - UNI UM100.24
Total Price: $3.30
This item: Uni-ball Signo UM-100 Gel Ink Pen - 0.5 mm - Blue Black - $1.65

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Customer Reviews

Amazing pen, great flow...
December 19, 2010
Verified Purchase
Amazing pen, great flow and consistency. Didn't skip. It's not the nicest looking pen but overall it's still nice to write with.
2 people found this helpful
Great pen, for what it...
April 4, 2014
Verified Purchase
Great pen, for what it is. The lines go down smooth, consistent, and dark without the blobs common to a lot of gel pens. Pilot "Choose," I'm talking about you here! Generous amount of ink in the refills, which allows for plenty of writing. I would rate these even higher than the Pilot Hi-Tec C, and certainly more affordable.
1 person found this helpful
I am obsessed with this...
August 15, 2013
Verified Purchase
I am obsessed with this pen!
This is definitely the best pen I have ever used, with great smooth and crisp writing. The grip is just right, and I love this pen. For the price listed, this is possibly the best catch on the site!

Thanks jetpens!
1 person found this helpful
Excellent pen for note...
May 11, 2009
Verified Purchase
Excellent pen for note taking! nice, controlled and THIN lines, good size barrel, does not scratch onto paper, etc. This is my favorite pen for note taking for long periods!

and below, I meant to say 'heaven' :-D
1 person found this helpful
This thing feels like...
April 14, 2009
Verified Purchase
This thing feels like heaving when writing on paper. it's soooo soft and precise. I use this pen and the jetstream I have and prefer this over the Jetstream. If you are trying to find out which pen fits you best, definitely give this one a shot!
1 person found this helpful