Refill Ink - For EnerGel Gel Pen, (0.7mm) Medium Point,, Violet Ink - Gel Ink Refills for Pentel EnerGel Gel Roller Pens (BL57, BL77, BL407, BL107, BL117, BL2007, K600, K611, BL437), 0.7mm, Violet Ink