Uni-Ball Signo UM-153 Gel Ink Rollerball Pen, 1.0mm, Broad Point, Black Ink, Pack of 6

These are great pens. I use them for ink tracing. Thick bold line and flows well. Have made several purchases.

Absolutely in love with these pens! I usually use these for artwork and occasional notes. I got one for a gift last year and loved it so much I had to buy more. I love how dark the ink is and how smoothly they write. It does have a little bit of dry time (like most gel pens) so be aware of that. Definitely worth the money. Decent grip and size, great performance. 10/10 recommend

My manager had one of these pens and I took a pic of it so I could find it myself. It’s one of the best pens I’ve ever used!

These are becoming a new favorite. Super smooth and thick, I recommend pairing them with that least 100gsm paper to prevent bleeding.

UM-153 has my favorite writing tip and my favorite inks in black, blue-black and red. Haven't tried the green.

Love these pens for the ink that flows nice and dark. The one star off might not be fair, but it was to indicate the ink level in the pen dwindles faster than expected. Obviously that's due to the nice flow of ink, so, there's the facts. You be the judge. As for me, I will order them again. If the ink is dry, it will be waterproof, and that's nice too. : ) P.S. I felt bad and went back to change it to 5 stars.

I own many uniball pens but the ink in these pens bleed through paper. My other uniball pens do not. Makes me wonder if this is real uniball ink. It writes much like my others, but I hate that they bleed through paper. Makes for sloppy work. Pens were not in a store package but a bag taped with black tape. EDIT: I used a better quality paper and they wrote beautifully. I do think the description should read "open stock".

Why did you pick this product vs others?: I’m an artist and I have the capacity to grind pens to dust. I push them to their limits. These survive usually.

Great pen for rock painting. Fine lines for written messages.

I have bought many of these pens over the counter in Japan (Loft), and they have been great and lasted well. These online purchases are very disappointing. I've used 2 of the 6 and they have both performed badly. As soon as the pen hits the paper I end up with a great splotch of ink. They also ran out very quickly but I guess that's because the ink just seems to fall out of them as they touch the paper.