Constructed of raw brass, the antimicrobial surface of this specially designed Fisher Space Pen is registered by the EPA, certified to offer extra protection wherever you may need to sign a receipt, or do any writing in public spaces. Of course, it also features the incredible pressurized ink cartridge that allowed all of our NASA astronauts to write in extreme temperatures, and at any angle-even upside down and in zero gravity. Arrives nicely boxed, writes in smooth black ink. 5 3 / 8" long.