These Kaweco mini converters will allow you to fill from an ink bottle. Compatible with the Sport line of fountain pens. They fit just like a cartridge and operate using a plunger mechanism. This newly redesigned version features a foldable plunger, which not only makes it less likely that the ink inadvertently gets pushed into the cap, but it allows the converter to fit in much smaller “cartridge-only” pens beyond the Kaweco Sport, including the Schon DSGN Pocket 6 and the Studio Pocket from Tom’s Studio.

Sold individually.