• SEALED PRESSURIZED INK REFILL • Refill tip is Ultra-hard Tungsten Carbide Ball, Stainless steel precision socket prevents leaking yet delivers uniform ink flow. • Writes underwater, upside down, at any angle,extreme temperatures from – 30º F (-35º C) to +250º F (121º C), over grease, 3 times longer than the average pen, etc. • Compartible with all standard Fisher cartridges. • Bullet Grips have rubber finger grip. • Comes with attractive gift box. • Classic Bullet Pen in Chrome with Shuttle Emblem. When closed, the Bullet Space Pen is the perfect size to carry in your wallet, pocket, purse, car glove box, organizer or toolbox; they will write upside down - at any angle, under water, through grease, extreme temperatures -30 to +250 degrees F, on almost any surface, three times longer than the average pen, and of course in the gravity free vacuum of space. • When opened it's a full sized, evenly balanced writing instrument. • The original Bullet Space Pen was conceived in July of 1948 by Paul Fisher, who was soon machining a new pen design shaped from solid aluminum. • This became our first Fisher ball point pen, the #400 Bullet Pen, and arguably the most popular pen of the twentieth century. • This pen is now composed of all brass with a chrome finish. • Cited as an outstanding example of industrial art, the classic design of the Fisher Bullet Pen has been exhibited for years in the New York Museum of Modern Art. • The Bullet's timeless styling has been the topic of many art books and magazine articles. • Often imitated but never duplicated, the Fisher Bullet Space Pen continues to be the most popular pen.