Fisher Space Pen  Pressurized Refill

• Pressurized cartridge continuously feeds ink to the tungsten carbide ball, allowing pen to write at any angle, even upside down
• Visco-elastic ink writes smoothly and dependably on most surfaces, even underwater, over fingerprints, in freezing cold, in extreme heat and in space!
• Since 1967, Fisher Space Pens have been used by American astronauts on all manned space flights
• Stainless-steel, precision-machined socket prevents leaks and oozing, yet delivers uniform ink flow
• Ink will not dry out for over 100 years

Made in USA.