See All PLXO2436 Round Rectangular Acrylic Outdoor Convex Security Mirror, 36" Length x 24" Width (Pack of 1) Rectangular convex mirror with two rounded sides reflects a wide angle image at a diminished size to help extend a field of view Helps a person see around obstacles for safety, or monitor a wide area for efficient surveillance Acrylic is shatter resistant, weighs less than glass, and reflects a clear, bright image ABS plastic backing for resistance to impact and wear, with vinyl-coated aluminum edge for weather resistance in outdoor applications Comes with mounting hardware that makes the mirror angle adjustable after installation