Fisher Space Pens are renowned for their ability to perform in adverse conditions. The technology starts with a non-skip, textured tungsten-carbide ball encased in a stainless steel ball socket. The sealed ink cartridge is pressured at about 45 psi and contains a visco-elastic, thixotropic, solid-gel ink. Able to write upside down, under water, in extreme temperatures and in zero gravity, Fisher Space Pens are ultra-reliable tools to aid in analog data storage and communication.
The model 725 Trekker was built to go anywhere. With its built-in key ring, it attaches to zipper pulls, packs, inside jacket pockets, belt loops, or to a lanyard string around your neck.
The TAD edition is laser engraved with our logo and signature topo pattern. We worked hard with Fisher to ensure the quality of the engraving. The resulting pen is a classic form factor with a Triple Aught Design edge.