Fisher Space Pens SPR9 Turquoise Ink Medium Point Space Pen Pressurized Fisher writing instruments write in temperatures from -50 to 250 F, underwater, in zero gravity, at any angle even upside down! That"s why they"re the choice of ski patrols, search and rescue teams, law enforcement agencies, armed forces, and anyone who demands writing reliability in adverse conditions. Fisher Space Pens SPR9 Turquoise Ink Medium Point Space Pen Pressurized Features: Turquoise Ink Medium Point Refill Pressurized