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

 Refill Format: Standard Ballpoint; Refill For Series: Pilot® Dr Grip® Center of Gravity Ballpoint Pens; Refill Ink Color: Blue; Color Family: Blue.