PILOT Frixion Rollerball Refill 0.7 Pack of 12 (Black)

Erasable rollerball refill: perfect for quick and clean correction of errors Stainless steel tip lead with tungsten carbide ball. Pressure resistant and durable Ball diameter: 0.7mm Line width: 0.4mm Refill for FriXion Ball 0.7 and FriXion Clicker 0.7 Box contents: 4x set of 3 leads in black ink