Fisher Space Pen technology is designed for more than just outer space. Thanks to their patented sealed and pressurised ink refill, you can write in almost any conditions and on almost any surface. Underwater or on grease. Extreme temperatures (-30 to +250 F / -35 to +121 C). Upside down or floating in a gravity-free zone.
Sealed and pressurised ink refills last three times longer than the average biros with an estimated life of 100 years.