From the maker of the pen that went to the moon and still used on all manned space flights; comes the new Bullet Grip Stylus Space Pen . This particular pen features a silicon rubber conductive stylus that is ideal for touch screen cellular smart phones and tablets. The patented ink cartridge was designed by Paul Fisher for NASA in the 1960's enabling it to write in temperatures from -30 to +250 degrees Fahrenheit, under water, in zero gravity, at any angle, even upside down.