Standard converter, for all long fountain pens from Kaweco (such as "Special" or "Perkeo"). The converter can be used instead of two ink cartridges.
By turning the rear part of the converter, the piston is turned forward. Immerse the cartridge in the ink glass and screw the piston up again, ink is sucked in. Filling several times in a row increases the filling quantity.
ATTENTION: Not suitable for Kaweco "Sport" or "Liliput".