This green Diplomat Aero fountain pen features a Zeppelin-inspired anodized aluminum body with groove-like depressions on the barrel and cap. It has a satisfying soft sliding click cap that posts securely onto the barrel when writing. It features a smooth writing #6 JoWo nib in your choice of silver steel or two-tone 14kt gold, a matte gunmetal grip and trim, and fills via standard international cartridge/converter (both are included).