Diplomat Aero pens are known for their distinctive Zeppelin-inspired design, specifically the groove-like depressions on the barrel and cap, giving them a modern and vintage feel. They are crafted from anodized aluminum.The pens also come in various colors and trims, and utilize a precision stainless steel nib (like the JoWo nib in some models) and are available in fountain pen, roller ball pen, ballpoint pen, and mechanical pencil options.