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

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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!

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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
This pen is my absolute...
September 17, 2015
Verified Purchase
This pen is my absolute favorite. I consider myself a pen junkie- I've always loved pens and have had a fascination with them. When I discovered thinner Japanese pens, I fell in love. The thinner, the better. This pen was the thinnest I ever found, and wrote like a dream.

It takes some getting used to- at first, it feels almost scratchy because the tip is so incredibly fine. With a gentle and light hand, however, it writes beautifully. Something about the superfine tip makes ugly chicken scratch even look pretty.

Unfortunately it's discontinued now, but if it ever comes back in stock, I'm buying like a million of these refills. They're the best.
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!