This uni-ball refill will work in the Pentel FR10 1mm pen
San Francisco, CA
the impact RT gel pen/refill instrument is one of the finest writing instruments commercially available. I insist and supply all my employees use the RT gel when writing orders/reports. For legibility it is unsurpassed which is why we use only the bold (1.mm) refill.
Van Nuys, CA
I try to exclusively use the Gel Impact RT Roller pens and sometimes it can be hard to find refills. I'd recommend these to anyone else who needs them.\n\nThey're the factory originals so, I couldn't ask for anything better suited. \n