Filot Friction Erase Pen - 0.7 mm Refill Ink CartridgeBlue.
※ Fiction Ball Knock 07 Refill Ink Set (3 pieces) - 3 types Fiction Ball Knock 05 Refill Ink Set (3 pieces) - 3 types
Fiction Point 04 Gel Ink Pen Refill Ink Set (3 pieces) is all compatible, so please note that.