The Diplomat Aero Blue fountain pen features a Zeppelin-inspired anodized aluminum body with groove-like depressions on the barrel and cap. Made from full aluminum casting that is anodized and matte chrome fittings. The body has groove-like depressions on both the cap and the barrel. It has a satisfying soft sliding click cap that posts securely onto the barrel when writing. 

 Nib Material: Stainless steel

Filling Mechanism: Cartridge, Converter