Fisher Space Pen - The Original Astronaut Pen

All brass & steel construction, hard chrome plating, pocket clip & tungsten carbide ballpoint tip. Used on NASA Apollo/Shuttle missions, International Space Station, Everest North Face Ski Expedition. Pressurized thixotropic ink cartridges are hermetically sealed & write 3x longer than ballpoint pens. Reliably performs in extreme temperatures (-30F to +250F), underwater, in zero gravity, at any angle. Precision assembled & hand-tested with a lifetime guarantee against all manufacturing defects.