The Kaweco converters are ideal as a cartridge replacement or their function is reminiscent of the "old filling system" and the use of an ink glass. By drawing up the ink, the converter is like a refillable cartridge. To refill, leave the pen in the pen and dip the nib into the ink bottle while you draw the ink. There is an explanatory video under Kaweco Tutorials.
This Kaweco STANDARD threaded converter is suitable for all larger fountain pens.
This Kaweco STANDARD threaded converter is suitable for all larger fountain pens.