Fisher Space Ballpoint Pen Refill in Purple - Medium Point

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 - SPR6 Pressurized Cartridge - Purple Ink - Medium PointFeatures: PR Series Pressurized Cartridge Refill Writes Upside Down & Underwater Brass & Steel Construction Includes: Parker Adapter Color: Purple Ink Point: Medium Point Blister Card Packaging