- Replaceable pressurized ink cartridge continuously feeds ink to the tungsten carbide ball, allowing pen to write at any angle--even upside down
- Thixotropic ink writes smoothly and dependably on most surfaces, even under water, on photographs, in freezing cold, extreme heat and in space!
- Stainless steel, precision-machined socket prevents leaks and oozing yet delivers uniform ink flow
- Revolving ball liquefies the ink so that it writes more smoothly, more dependably and longer than most pens
- Medium point, black ink
Made in USA.
Since 1967, Fisher Space Pens have been used by American astronauts on all manned space flights.