Fisher Space Pens Blue Ink Medium Point Refill, Carded

High-quality gas pressure refill - original Fisher Space Pen replacement refill SPR1 in blue, line width medium Reliable under extreme conditions - writes in weightlessness, upside down, underwater, in cold down to -35 °C and heat up to +120 °C Durable and leak-proof - thanks to the sealed gas pressure system, virtually unlimited durability and no leaks Universal uses - ideal for outdoors, travel, workshop, expeditions or everyday use Easy compatibility - fits Fisher Space Pen ballpoint pen; Package includes: 1 refill