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Every Fisher Space Pen is the ultimate in dependability and contains an improved version of the sealed-pressurized ink cartridge proven in over 40 years of use in manned space flight. They are so dependable that they are still used on every manned American and Russian space flight as well as every day on the International Space Station. The Space Pen is guaranteed to write in temperatures from (-30 ͦ F / -34 ͦ C) to (+250 ͦ F / 120 ͦ C), underwater, in zero (micro) gravity, at any angle – even upside down!

The Infinium Space Pen writes far longer than our standard Space Pens which write three times longer than an ordinary ball point pen. This Infinium Space Pen will write so long in fact, that the average user won’t run out of ink in their lifetime. They are precision assembled, hand tested and carry an unconditional lifetime guarantee.

We believe our pens are the most reliable in the world. If you’re not completely satisfied with your Infinium Space Pen or if it runs out of ink during your lifetime, return it for a free repair or replacement.