Zebra Oil-Based Ballpoint Pen Refill for AirFit Light, AirFit Light S, AirFit, AirFit S, HandFit R, Prismee, Jim Knock Black Ink, 0.7mm Point (BR-6A-K-BK) Zebra Oil-Based Ballpoint Pen Ink Refill for AirFit Light, AirFit Light S, AirFit, AirFit S, HandFit R, Prismee, Jim Knock BR-6A-K-BK