Fisher Space Pen Pressurized Ball Point Refill Cartridge (Blue) SPR1F

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The Fisher Space Pen was originally developed for Nasa in 1965 with a pressurized ink cartridge that is capable of writing in freezing cold, boiling heat, underwater, and upside down. This regular sized replacement cartridge will fit most current Space Pen models. It also includes an adapter to fit Parker Style pens. This ball point Space Pen refill has a blue ink color.