The Cap for this exciting new Space Pen model is an actual .375 H & H Mag Shell. What a special gift for the hunter or outdoors enthusiast. Inside is a lacquered Brass Bullet Space Pen. When closed, Bullet Space Pens are the perfect size to carry in your wallet, pocket, purse, car glove box, organizer or toolbox. When open it's a full sized, evenly balanced writing instrument.Length: Open - 5.25" Closed - 3.75' in a clam shell gift box.