the Pilot BRFN-30F is a metal bodies refill contains Pilot's :pw -viscosity Acro hybrid ink. this ink allow for smooth pen tip rotation and a skip
Pilot BRFN-30 Ball Point Pen Refill Medium Point Blue Ink (Single Refill)
Pilot BRFN-30F-B Acro Ballpoint Pen Refill for
Pilot BRFN-30M-B Acro Ballpoint Pen Refill for
Brands – Page 208
Pilot BRFN-30M Acro Ink Ballpoint Pen Refill - 1.0 mm - Black
Refill BRFN-30 for ballpoint pen Pilot - Blue - Medium tip
Pilot
Pilot 0.7mm Black Ink Refill(BRFN-10F-B), for Dr
Pilot BRFN-30F Acro Ink Ballpoint Refill .07mm - Blue