Parker-style refill for the Fisher Space Pen or similar pressurised pen.
Specially developed ink is continuously driven to the tungsten carbide ball point by the internal pressure in the hermetically sealed cartridge.
Writes upside down, underwater, and in extreme heat or cold (from -35°C to +121°C).
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I don't know how you got a book printed 26 years ago in the conditions that I received it (like new) but you do it! ABSOLUTELY AWESOME!
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