About the product
- All brass & steel construction, variety of colors and finishes & tungsten carbide ballpoint tip
- The 400 series bullet space pen is the original Fisher ball point pen & most popular Fisher pen sold
- 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
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