Pentel Refill Ink for BL60 EnerGel Liquid Gel Pen, 1.0mm, Metal Tip, Black Ink, Box of 12 (LR10-A-12) Refill for EnerGel Liquid Gel Pen (BL60) Quick-drying, super-smooth ink 1.0mm, metal tip writes bold lines Black Ink 12 refills per box