The Kaweco Supra fountain pen is made from solid, lead-free eco brass, which is untreated and will develop a unique pattern with use. The Kaweco Supra looks more glamourus and is the big brother of Kaweco Liliput fountain pen. The barrel includes a special connecting piece that can be added or removed to change the length of the pen by 3 cm. With the piece installed, the Supra is a full-size pen that can hold a standard international converter, one standard international long ink cartridge, or two standard international short cartridges. Without the piece installed, the Supra is about the same length as a Liliput and can hold a single standard international short cartridge.