Fisher Space Pen Refill - Various Colours

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About Fisher Space Pen Refill - Various Colours Sealed Pressurised Ink Cartridge. Writes -30ºF (-34ºC) to +250ºF (121ºC), underwater at any angle, even upside down! Ink will not dr y out in 100 years. Originally developed for use by the NASA astronauts, the Fisher Space Pen is the last word in writing dependability. It's the choice of ski patrols, search and rescue teams, law enforcement agencies, armed forces and everyone who demands reliabilty in a writing instrument. Ultra-hard tungsten ball. Thixotropic ink in a hermetically sealed, pressurised reservoir. Writes 3 times longer than an ordinary ballpoint. Sliding float separates ink from pressurised gas. Gas plug. Available in a range of colours and tip sizes. Show more