See All PLX36 Circular Acrylic Indoor Convex Security Mirror, 36" 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 Tempered hardboard backing for good strength-to-weight ratio in indoor applications Comes with mounting hardware that makes the mirror angle adjustable after installation