The German-made Octopus Fluids® piston converter replaces conventional fountain pen ink cartridges. Instead of simple plastic cartridges filled with average ink, the Octopus Fluids converter allows you to prescribe noble inks with fantastic colours and excellent writing characteristics in your existing fountain pen.
The capacity of the converter is approx. 0.75 ml, which corresponds to the content of an ink cartridge. It is compatible with all fountain pens with a standard ink duct connection (2.6 mm).
