Fisher Space Pen Ink Cartridge, Fine Point (Black)

Upgrade your FN Pen 1.0 & 2.0 (wrench included). The FN Pen ships with a standard D1 pen cartridge by default. Fisher Space Pen’s Sealed Pressurized Ink Cartridge performs in temperatures from -30º F to +250º F, underwater, in zero gravity, at any angle - even upside down!  The choice of ski patrols, search and rescue teams, law enforcement agencies, armed forces, and everyone who demands reliability in a writing instrument. Read our ink cartridge instructions here.