The Refill B is suitable for sizes 0.2, 0.25, 0.3, 0.35, 0.5, 0.7mm, and BS Copic Multiner SPs. The Copic Multiliner SP inking pens are pigment-based, and provide the highest quality for all your inking needs. The ink cartridges and replacement nibs are available so you never need to throw these durable aluminum bodied pens away. Details:BlackCompatible with Copic Multiliner SP sizes: 0.2, 0.25, 0.3, 0.35, 0.5, 0.7mm, and BS Copic Multiner SPsAluminum bodyWaterproof and archival