Famously used by astronauts since the Apollo missions of the 1960s and 70s, Fisher Space Pens have captured imaginations with their amazing ink that can write virtually anywhereupside-down, underwater, over grease, and in extreme hot and cold temperatures. Style:��Retractable Size: Approximately 6" Cartridge:��Pressurized Silver Ink Bold Packaging:��Blister Card Made in USA