Pilot FriXion Erasable Rollerball Pen Gel 0.7 Medium - Pack of 3 -Black Red Blue
Refillable using Pilot FriXion Erasable Rollerball Refill 0.7mm BLS-FR7-S3. FriXion Ball, the original one! FriXion it - Remove your mistakes by rubbing with the eraser stud and watch the ink disappear.