Fisher Space Pen rose to prominence when founder Paul Fisher invented a retractable, pressurized pen called the Anti-Gravity 7 (#AG7), which worked flawlessly in zero gravity aboard the first manned Apollo mission in 1968. Five decades later and the company continues to thrive, with pens still being flown aboard every manned space flight. To this day, Fisher Space Pen continues to focus their efforts on developing unique, quality products made in the U.S.A. All Fisher Space Pens are handcrafted and able to write underwater, over grease, at any angle, upside down, in extreme temperatures ranging from (-30°F to +250°F), in zero gravity and lasts 3-times longer than the average pen.