FABER-CASTELL Replacement Nib Unit - e-motion - Pure BlackRefresh your pen with a new nib The Faber Castell e motion Pure Black Replacement Nib Unit is a complete screw in nib assembly designed specifically for the e motion fountain pen range. Simple to install, making it easy to maintain your pen long term or experiment with different writing widths. Designed for the Faber Castell e motion Pure Black Fountain pen. Supplied as a nib unit including the grip section. To change the nib, unscrew the original