The signal mirror has repeatedly been rated as the most effective daylight-signaling device available and has been seen from up to 100 miles away. Because of this, the Star Flash Signal Mirror is included in all Air Force Survival Kits. The Star Flash Signal Mirror is made of Lexan, floats and is virtually indestructible. Aiming of the Star Flash is accomplished by use of its trademarked center star. Instructions for use are written right on the mirror. Other uses around camp include shaving, applying makeup or camouflage, or inserting contact lenses. Size is 2" x 3"