This high-quality, German-made stainless steel replacement nib unit is compatible with the fountain pens listed under Compatible Products. To replace the nib of any compatible pen, use your fingertips to grip the top of the old nib and the feed of your pen and unscrew the nib unit from the grip section. Grip the nib and feed of the replacement nib unit and screw it into the grip section until it is tight. Do not grip the nib by its sides, as this can damage the nib.
Note: This nib unit is compatible with the original version of the Karas Kustoms Ink fountain pen, which uses Schmidt nibs with the same Schmidt logo printed on the nib. It is not compatible with newer Karas Kustoms Ink pens that come with larger Bock nibs that do not have the Schmidt logo engraved on the nib.