Copic Multiliner SP .3mm pen replacement nib is easy to install into your Multiliner SP ink pen. Never throw your Copic SP away! Copic Multiliner replacement nibs are precision plastic nibs in a steel housing. Unlike most replacement nibs that puncture an ink cartridge and draw up liquid ink, the Multiliner replacement nibs have a long filament that draws the ink up from the ink cartridge. The cartridge itself has a fiber stopper that prevents the ink from dripping or spilling out, and the filament at the base of the nib dips through the fiber stopper to draw the ink up into the nib. PACKAGE OF 1. Copic MLSPN03 Multiliner SP .3mm replacement nib.