Blue Ink Medium Point Space Pen Pressurized Cartridge.
This is Fisher standard 3 1/2 inch or 8.89 cm Pressurized Cartridge that fits most Fisher pens and come with a plastic adapter which allows it to be used in Parker Style Pens! . The Write Out for this Cartridge is approximately 4500 metres depending on writing style.
Fisher Space Pen PRESSURIZED CARTRIDGES
Fisher Space Pen’s Sealed Pressurized Ink Cartridge
Performs in temperatures from -34ºc to +120ºc, underwater, in zero gravity, at
any angle–even upside down! The ultimate in dependability! The choice of ski
patrols, search and rescue teams, law enforcement agencies, armed forces, and
everyone who demands reliability in a writing instrument.