Uni-BallSigno Extra Fine Point Gel Pen Refills Black Ink 0.28 mm Set of 6 (Japan import)

The part that holds the metal part (where the ball sit) is very different than the one that came with the pen itself. Will not buy again. Just buy the pen itself. Save your money.

Purchased the refills to us with the Uniball .28 Fine pens I like very much. Of course, they don't fit! These refills apparently fit a different pen than the UNM-155-28 I am so happy with. I found a TUL pen that would accept these refills, but won't retract and doesn't feel as good in my hand. Uniball and Amazon could do a better job of pairing refills with the pens they fit!! Not happy.

Well, the positive feature is that these refills were the fine points I liked, however, these refills had to be snipped 1/4" in order to fit the pens which made the springs unable to work to click on or off. I'm able to use the pens with these refills, however, will not purchase again.

Thought it was a refill for my favorite uniball signo 0.28 pen, but it didn't fit. Only way I made it work was by taking the spring out and now it's not retractable.

These pens are excellent, the fine point is great for writing small text legibly. And the ink has virtually no smearing. They're a great buy. I will keep some handy. I ordered the refills, too.

I like these. They feel just right in my hand and do not glob ink on the paper.

I tried cutting them to size and it didn't work.