See All PLXO12 Circular Acrylic Heavy Duty Outdoor Convex Security Mirror, 12" Diameter (Pack of 1) Circular convex mirror reflects a wide angle image at a diminished size to 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