Uni-Ball One F/P Refill

The Uni-Ball One F/P Refill is a black gel ink with a seamless flow. The vivid silky ink is fast-drying and bleed-resistant—ideal for fast writers who are prone to smudging the page. It is the stock pen cartridge for the Uni-Ball One F Gel Pen and the Uni-Ball One P Gel Pen. Pens sold separately.  Choose from 0.5mm or 0.38mm tip. 1 refill. Black ink.