Uni-ball Signo RT1 UMN-155 Gel Ink Pen - 0.38 mm - Violet

Uni-ball Signo RT1 UMN-155 Gel Ink Pen - 0.38 mm - Violet

In stock and ships within 1 business day.
4.7 (6 reviews)
DescriptionSpecificationsFrequently Asked Questions
With their Signo RT1 pen, Uni-ball unveils an innovative tip design. The tip is rounded and edgeless to reduce friction against the paper, resulting in a super-smooth writing experience. Mirroring that smoothness is the simple body consisting of a clicker with clip, and a rubber grip that blends almost seamlessly into the barrel.
Model NumberUNI UMN15538.12
Weight0.4 ounces
Body Color Purple
Body Material Plastic
Clip Material Plastic
Clippable Yes
Color Set No
Diameter - Grip 10.6 mm
Diameter - Max 10.9 mm
Grip Color Purple
Grip Material Rubber
Ink Refillable Yes
Length - Extended 14.0 cm
Length - Retracted 14.1 cm
Mechanism Retractable
Pre-Installed Ink Color Violet
Tip Length 4.8 mm
Tip Material Metal
Tip Size 0.38 mm
Tip Type Conical
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Customer Reviews

Very smooth ink flow,...
July 4, 2015
Verified Purchase
Very smooth ink flow, comfortable design. In terms of writing performance, this is a very good pen. Puts down lines that seem to resemble ballpoints rather than the wetter flow of other gel pens and even the Signo UM-151 pens.

The clicker/clip tends to rattle slightly, which is a small quibble.

This pen's refill says UMR-83, meaning that it uses the same refill type and design as the Signo RT. If you're looking for a cheaper pen or refill with the same writing quality, those would also be good options.

Time will tell if the flow decreases near the end as with other gel pens, but that isn't even a complaint. None of my finer-point gel pens have survived long enough for the ink to run out completely, and I'm fine with that.
1 person found this helpful
Love these pens. Love...
April 13, 2015
Verified Purchase
Love these pens. Love the fine line and soft grip that goes almost to the tip of the pen.
1 person found this helpful
Great quality pen!!!!...
February 13, 2015
Verified Purchase
Great quality pen!!!! Beautiful and smooth ink!!!! Very well balance in my hand when writing!!! Very beautiful shade of violet!!! Couldn't ask for more!!!
Absolutely love these...
November 9, 2014
Verified Purchase
Absolutely love these pens. Bright ink, and nice smooth writers! And retractable points!
I was pretty disappointed...
January 29, 2014
Verified Purchase
I was pretty disappointed with this pen. I like the other 0.38 Signo pens (dx and rt) for the fine tips and smooth writing. While this color is a great purple I find that it doesn't always write well because of skipping. When it doesn't skip I like it just as much as any of my other Uni-ball Signo pens.