Ink converter to fill your fountain pen. Suitable for all fountain pens that can be used with standard cartridges Refuelling the fountain pen itself from an ink bottle provides an intense writing experience. Just like in the old with spring and ink. In combination with the Schneider pastel ink and the Callissima calligraphy pen ideal for creating bullet journals or greeting cards with calligraphy. By using the converter, you do not use cartridges and participate in protecting the environment. Box contents: piston converter for filling a fountain pen from the ink glass.