Pilot FriXion Point 0.4 Erasable Gel Pen Black Ink Refill(LF-22P4-B), 3 Refills X 3 Pack/total 9 Refills (Japan Import) [Komainu-Dou Original Package] Refill for Pilot FriXion Point Erasable Gel Pens, 0.4mm, Black (LF-22P4-B) Ink color: Blue Black The diameter of a ball: 0.4mm. Fine Point. Thermo-Sensitive Gel Ink formula disappears with erasing friction. Reasonable set. Total 9 Refills.