Fisher Space Pen Black Trekker Key Ring Space Pen

The pioneering technology of the Fisher Space Pen Trekker Space Pen means it can hang upside down forever, and still function when needed. It includes a Fisher PR4 medium point pressurized black ink cartridge, a keychain ring with a posi-lock cap, and a carabiner. - Fisher Space Pen Trekker Space Pen - Matte BlackTrekker Space Pen, MATTE BLACK -

Fisher Space Pen Black Trekker Key Ring Space Pen: Metal carabiner Breakaway lanyard Black medium refill Writes underwater, upside down, at any angle Works in temperatures from -30 to +250 degrees Fahrenheit Writes over grease Lasts 3 times longer than the average ballpoint pen