The Pilot BRF-25-B-B is a 1.2 mm super thick ballpoint refill. This refill is generally not available in the US but can be ordered from Japan using Ebay, or similar service.
The BRF-25B-B is a 250 JPY refill with a metal body. It’s only sold in black. It uses a 1.2 mm super thick ball tip where the BRF-25BB-B uses a 1.6 mm writing tip.
Pilot BRF-25B-B Ballpoint Pen Refill Information
|Max Body Width
|Refill Length (cm)