Pentel EnerGel Refills gives life back to your favourite EnerGel pen once it has run out of ink. Containing quick-drying, smooth flowing gel ink that is smooth and comfortable to use. The refill is suitable for use in Pentel EnerGel pens including BL107, BL77, BL57, BL437R1 and Sterling Symphony and Excel gift pens. Supplied in a wallet containing 3 black ink refills with 0.7mm tips.