.375 Cartridge Space Pen

These Fisher Space Pens are made from shell casings and are designed for durability and versatility, suitable for both outdoor and desk use. They feature a sealed and pressurized ink cartridge that allows writing in various conditions.

• The description claims that Fisher Space Pens can write underwater, over grease, in extreme temperatures, upside down, and in a gravity-free zone.
• The description claims that Fisher Space Pens have a 100-year shelf life.