This black and white marbled limited edition Diplomat Aero fountain pen features a Zeppelin-inspired aluminum body with groove-like depressions on the barrel and cap. The unique pattern is made using a hydro dipping marbling technique – the swirling color dyes are floated on the surface of a solution, then each pen is dipped in, transferring the pattern onto the body of the pen. A protective coating is then placed on the marbled pen. No two are exactly alike! The Aero has a satisfying soft sliding click cap that posts securely onto the barrel when writing. It features a smooth writing #6 JoWo stainless steel nib or two-tone 14kt gold nib, a dark grey grip and trim, and fills via standard international cartridge/converter (both are included). Due to the unique manufacturing process, there is at least one point on every pen where a small gap or overlap in the pattern could occur. These vary in severity, location, and subtlety and are to be expected with this Volute design.