Pilot Hi-Tec-C Coleto Gel Ink Pen Refill 0.5mm, 5 Set Black (Japan Import)

These are my favorite for multi-colored pen as an RN. They write very smoothly, can be ordered in various thicknesses (I like very thin), smudge very little, and are vibrant colors so even light colors show well. The black has a rich black color, but still very thin. I just wish the refills held more ink.

I love these multi-pen refills! Makes my life easier at work! Smooth writing, no skipping.

Refills times 5. Easy to load black ink

Someone will buy these for this reason: you can cut them down to size to fit inside the older version of the Muji gel ink pen. However, the long black piece of plastic shows through a little from the translucent Muji pen body. Nonetheless, these are confirmed to work for that purpose.

sort of flimsy but overall love these pens

Let's face 7$ for a real porcelain roller ball pen? IDK but I seem to score with Prime, every time. It's bold but in no way obnoxious, It writes smooth, no ink splots if you hesitate, like if sketching.... worked great, I usually use fountain pens, but I'm growing tired of refilling them, or keeping the tip moist while sketching. Even formal letters I find this more usefull.

I think there's only a small amount of ink, but maybe it's because I use this pen ALL the time, so it runs out pretty fast. It writes very clean and smooth.

Excellent value: at $1.30 a refill these are among the cheapest I've found for Hi-Tec C Coleto refills. The black is opaque and flows wonderfully, a true joy to use. I wish there was a big more ink per refill, but this is as good a price as I've found.