Fisher Air & Space Shuttle Pens developed by NASA, has a hermitically sealed pressurized ink reservoir, so it writes the instant the pen touches the paper.
Writes at any angle, underwater, over grease, in extreme temperatures – even upside down.
Writes twice as long as other roller ball pens.
Ink cartridge is pressurized at 35 pounds per square inch of gas..
Retractable with side button release....5.0"Length....All Metal....Fisher PR4 Pressurized refill.....Gift Boxed.