Fisher Space Pen Trekker Keyring Pen, Black Realtree, FP725BRT

Imagine being able to write a date on your calendar without your pen skipping. This is just one of the many challenges Fisher faced when it attempted to create a pen that could work in outer-space. The Space Pen utilizes revolutionary technology to make sure it performs in a variety of situations. Upside down, its side, through water, or in extreme temperatures, the Fisher Space Pen contains a sealed pressurized refill (SPR) that will perform. Even if you aren't a space explorer, the Fisher Space Pen can guarantee you can record every event of your next adventure without a second thought.

Specifications     
 
Finish:    Black Powder Coat
Length Closed: 98 mm (3.875")
Length Open: 92 mm (3.625")
Diameter: 9.4 mm (.370")
Weight: 22 grams
Cartridge: Pressurized 35 PSI
Ink: Thixotropic Black
Point: Medium #SPR4
Operating Range: -35?C  to 121?C