uniball is a Guiness world record holder for blackest gel ink with the uni one ink! This vibrant black ink is pigment based, so it doesn't sink into the page.
This is for the .38mm refill only in black ink.
Uni-ball One P Gel Pen Refill – .38mm
$3.00
Skip to product information
Uni-ball One P Gel Pen Refill – .38mm
Mitsubishi Pencil Co.
$3.00
