Pressurized Stick Fisher Space Pen

6.2" retractable pen, non-refillable Space Pen. This pen has thixotropic ink in a hermetically sealed, pressurized reservoir writes three times longer than an ordinary ballpoint. It has a stainless steel precision socket that prevents leaking yet delivers uniform ink flow. The pen has a ultra-hard tungsten carbide ball & sliding float separates ink from pressurized gas & includes a gas plug. Precision assembled & hand tested.