Uni-ball Signo Bit UM-201 Gel Ink Pen Refill - 0.18 mm - Black

Uni-ball Signo Bit UM-201 Gel Ink Pen Refill - 0.18 mm - Black

This item is no longer available for sale on JetPens.com
DescriptionSpecificationsFrequently Asked Questions
The world's thinnest pen now has refills available! Stock up on refills so you can continue taking microscopic notes. Great for the environment, great for your pocket too!
Model NumberUNI UMR12118.24
Weight0.2 ounces
Diameter - Max 6 mm
Ink Color Black
Ink Refill Type Gel Ink
Quantity in Pack 1
Size - Length 12.4 cm
Tip Size 0.18 mm
Tip Type Needle Point
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Customer Reviews

Refills also fit Zebra...
June 1, 2013
Verified Purchase
Refills also fit Zebra Sarasa Stick and Sarasa Clip retractable pen bodies, if you gently remove the small plastic thing at the end of the refill. Unfortunately I've had two Signo Bit pen bodies crack where the body screws together. I could not fix it with glue or tape, but the refill was brand-new (and I luv the Bit!) so I tried to fit it in many different old pen bodies. I did notice the ink dry&scratchy when I used a Sarasa Clip body because this type of pen is meant to be protected by a cap when not in use, but the Clip is retractable, no cap.

YMMV, good luck :)
1 person found this helpful
The absolute best for...
June 8, 2015
Verified Purchase
The absolute best for writing on a C.D. Notebook. The paper is so creamy, the smoothest I've ever found, and these write perfectly.
January 28, 2015
Verified Purchase
I love these "sharp"...
November 6, 2014
Verified Purchase
I love these "sharp" pens. They're capable of writing tiny legibly and have good ink flow. Thank you Jet Pens for having what I need!
This pen is so fine and...
July 25, 2009
Verified Purchase
This pen is so fine and the ink lasts a long time. I've ordered several and friends all love it. You have to have a light touch, though, and not press too hard!