Fisher Space Ballpoint Pen Refill in Blue

The Fisher Pressurized Refills is the Fisher standard 3 1/2 inch Pressurized Cartridge that fits most of the Fisher Space Pens. The Write Out for this Cartridge is approximately 15,000 feet depending on writing style - 3 ½ times longer than a typical ball point Cartridge. Designed for NASA space missionsthis unique pressurized refill write upside down, under water, in gravity free space, over glossy surfaces and in extreme temperatures. Fisher Space Pen - Refills - SPR1 Pressurized Cartridge in Blue Features: PR Series Pressurized Cartridge Refill - PR1 Writes Upside Down & Underwater Brass & Steel Construction Includes: Parker Adapter Color: Blue Ink Blister Card Packaging