Fisher SPR4 – Black Ink Medium Point Space Pen Pressurized Cartridge Fisher Space Pen Exclusive Design

Black Ink Medium Point Space Pen Pressurized Cartridge. 
This is our standard 3 ½ inch Pressurized Cartridge that fits most of our 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.