The original Bullet Space Pen was conceived in July of 1948. Paul Fisher was soon machining a new pen design shaped from
solid aluminum. It became the first Fisher ball point pen, the #400 Bullet Pen, is arguably the most popular pen of the
twentieth century. This pen is now all brass with a Rainbow Titanium Nitride finish.When closed, the Bullet Space Pen is
the perfect size to carry in your wallet, pocket, purse, car glove box, organizer or toolbox. When open it's a full
sized, evenly balanced writing instrument. The patented ink cartridge was designed by Paul Fisher for NASA in the 1960's
enabling it to write in temperatures from -30 to +250 degrees Fahrenheit, under water, in zero gravity, at any angle,
even upside down.