Fisher Refill Red Ink Medium Point SPR2

Enhance your writing experience with the Fisher Space Pen Refills SPR1 Pressurized Cartridge in Blue Ink Medium Point. This ballpoint pen refill is perfect for upside-down, underwater, or through grease writing. The refill is made of brass material and is designed to fit the Fisher bullet, shuttle, and most other Space Pens. The pressurized refill ensures that your ink flows smoothly and effectively. The blue ink color adds a pop of color to your writing. The pressurized refill ensures that the ink flows smoothly and writes Upside down, Under Water and at temperatures from 250 to -30 degrees Fahrenheit (121 to -35 Centigrade)