The Space Pen was developed as a result of the designers experiments with new ink formulations and method of pressurizing a pen. When astronauts started to explore the reaches of outer-space, Fisher realized that no existing pen could perform in the boiling hot, freezing cold, gravity less void. Fisher designed and patented a pump action AG7 pen that would pressurize a special ink for about 30 seconds of write out so pen could write at any angle or zero gravity.
Specifications Finish: Matte Black Length: 130 mm (5.10") Diameter: 9.5 mm (.375") Weight: 27 grams Cartridge: Pressurized #SPR4 Ink: Thixotropic Black Point: Medium Operating Range: -35˚C • 121˚C Package: Gift Boxed