The Black Cherry Cap-O-Matic Space Pen, finished with Cerakote, is one of the toughest retractable pens in the Fisher Space Pen line. The pen is coated with a ceramic polymer-based material that provides excellent resistance to corrosion, chemicals, and heat. The Cap-O-Matic Space Pen has truly been the blue-collar workhorse of the bunch. The pen offers all the unique capabilities including writing upside down at any angle, underwater, through grease, in extreme temperatures (-30 to +250 degrees F), on almost any surface, in the gravity-free vacuum of Space and three times longer than an average pen. Suitable for tactical, military, outdoor, space and automotive trades with all brass construction and Cerakote polymer coating.