This pen combines a compact, stowaway design with a pressurized ink cartridge that allows the pen to write nearly anywhere, on anything. -Pressurized ink 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 under water, over fingerprints, in freezing cold, extreme heat and in space. -Stainless-steel, precision-machined socket prevents leaks and oozing. -Small, compact design fits almost anywhere; measures 3.75 inches and weighs less than 0.2 ozs -Ink will not dry out for over 100 years -Black ink; medium point -Since 1967, Fisher Space Pens have been used by American astronauts on all manned space flights.
High Visibility ORANGE TWIST ACTION PEN Black Ink Refill