This is a fountain pen converter for the Kaweco Special AL fountain pen, Kaweco Student fountain pen, Kaweco Allrounder fountain pen, and other pens listed under Compatible Products. This converter is not compatible with Kaweco Sport pens.
I experienced trouble with this converter from the start. I had a difficult
time getting the ink to flow with it and when it did flow the pen skipped.
Kaweco pens work flawlessly with a cartridge and the nibs are excellent. I
have not tried another converter with the pen or tried cleaning the converter.