UST StarFlash Mirror 2in. x 3in. This mirror by UST is lightweight virtually unbreakable floats and has a built-in precision aiming system to help you signal your objective accurately. Be prepared and have the U.S.T. Star Flash Mirror handy. Specifications for UST StarFlash Mirror: Manufacturer: UST Color: Silver Weight: 0.7 oz Dimensions: 3 x 2 x 0.25 in Features of UST StarFlash Floating Mirror: Unbreakable and scratch-resistant 100percent buoyant Unique star-shaped opening in the center of the mirror allows for precise aiming of the signal flash at an objective. Works best in full sun but flashes can be created even on overcast days or with bright moonlight Essential for any emergency preparedness or camping kit Dimensions 2x3 inches (5x8cm) Package Contents: UST StarFlash Signaling Mirror Lightweight virtually unbreakable signal mirror with a precision aiming system. Works even in overcast conditions or at night with moonlight or other light sources.