Delivers quick-drying, water-resistant and smear-free results. Patented, advanced liquid ink technology formulation offers a consistent, smooth flowing write. Trust Pilot® to deliver premium writing results. For Dr Grip® Center Of Gravity, Full Black, Pure White, Axiom and MR Ballpoint Pens. Refill Format: Standard Ballpoint; Refill For Series: Pilot® Axiom Ballpoint Pens, Dr Grip® Center Of Gravity Ballpoint Pens, Full Black Ballpoint Pens, MR Ballpoint Pens, Pure White Ballpoint Pens; Refill Ink Color: Black; Color Family: Black.