Product Description Converter specifically designed for pocket fountain pens. The ink converter is inserted into the grip as an alternative to an ink cartridge. Similar to a syringe, the ink is drawn directly from the ink bottle. This makes ink cartridges obsolete and thus reduces plastic waste. Thanks to the clever folding mechanism on the piston rod, the converter can be reduced in size by almost 20% while maintaining the same ink volume. This means it also fits into our smallest pocket fountain pens in the Liliput and Sport series.