Your favorite Uni-Ball One ran dry? Pop in a fresh cartridge and keep the barrel. The ink sits on top of the paper fibers instead of soaking in, which is why Uni-Ball One writing looks so dark and crisp, and it dries fast without bleeding through thinner pages. Match the tip size to your pen.
0.38mm or 0.5mm gel ink refill
Fits Uni-Ball One, One F and One P
Black, blue or red
Color may vary slightly depending on screen settings.
