Uni-ball Signo RT UM-138 Gel Ink Pen - 0.38 mm - Blue

Uni-ball Signo RT UM-138 Gel Ink Pen - 0.38 mm - Blue

In stock and ships within 1 business day.
4.7 (15 reviews)
DescriptionSpecificationsFrequently Asked Questions
Uni Signo RT gel ink pens contain water-based pigment gel ink and feature a retractable 0.38 mm gel ink roller ball pen, rubber grip, and a steel point for strength.

Super practical and affordable, the Signo RT pens have been a long time tried and true favorite of JetPals.

Model NumberUNI UMN103.33
Weight0.4 ounces
Body Color Blue
Body Material Plastic
Clip Material Plastic
Clippable Yes
Color Set No
Diameter - Grip 9.6 mm
Diameter - Max 10.6 mm
Grip Color Blue
Grip Material Rubber
Ink Characteristics Waterproof
Ink Refillable Yes
Length - Extended 13.8 cm
Length - Retracted 13.9 cm
Mechanism Retractable
Pre-Installed Ink Color Blue
Tip Length 4.4 mm
Tip Material Metal
Tip Size 0.38 mm
Tip Type Conical
There are currently no questions.

Frequently Bought Together

Uni-ball Signo RT UM-138 Gel Ink Pen - 0.38 mm - Blue - UNI UMN103.33
Uni-ball Signo RT UM-138 Gel Ink Pen - 0.38 mm - Black - UNI UMN103.24
Total Price: $3.30
This item: Uni-ball Signo RT UM-138 Gel Ink Pen - 0.38 mm - Blue - $1.65

Customers Who Bought This Item Also Bought

Curated Collections

Articles & Guides

Customer Reviews

The greatest pen on this...
February 9, 2015
Verified Purchase
The greatest pen on this Website. Buy it immediately.
1 person found this helpful
This is my number one...
July 27, 2015
Verified Purchase
This is my number one gel pen. I've tried a few but this one is best. Smooth writing, retractable, pretty blue ink, and refillable.
I have this in the polka-dot...
February 28, 2015
I have this in the polka-dot case. It writes very smoothly but sometimes it does skip. I think the UM-151s write more smoothly, but the UM-138s are so much more comfortable to write with for extended periods of time. The UM-138s also have a bit more friction when writing than the UM-151s, which I like because it helps me control my writing a bit better. Overall, this is a really good pen.
simply perfect...
February 23, 2015
Verified Purchase
simply perfect
I love these pens. This...
November 24, 2014
Verified Purchase
I love these pens. This color is one of my favorites. The lighter blue is kind of too light and matches the lines to my college ruled notebook paper. This one is moderately bright and very legible.