18kt gold #6 size nib and feed unit that can be used to replace Edison production model fountain pens such as the Collier, Hudson, Beaumont and Herald Styles. These nibs are two-tone, meaning that they feature both silver and gold in the design. The silver tone is created with rhodium coating. The Edison light bulb emblem is engraved into the middle of the nib’s face.
To Replace put your thumb and forefinger on the nib and gently unscrew the currently installed nib counter-clockwise until fully removed from the pen's front section housing. Then install the new nib by screwing clockwise into the section until the nib is firmly in place. Then connect converter or ink cartridge to fill up your pen and start writing!