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FISHER SPACE PEN® BLACK INK CARTRIDGE (#PR4)
The Fisher® Space Pen ball point cartridge, a pressurized design developed for NASA. It has a tungsten carbide ball point and thixotropic ink which will write in freezing cold, boiling heat, underwater and at any angle—even upside down.
- Fisher Space Pen® Black Ink Cartridge (#PR4)
- Refills Tao Pens, Williams Tactical Pens, and Bolt Action Pens
- Developed for NASA
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