See All PLX2030 Round Rectangular Acrylic Indoor Convex Security Mirror, 30" Length x 20" 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 Tempered hardboard backing for good strength-to-weight ratio in indoor applications Comes with a swivel mounting bracket that makes the mirror adjustable to a wide range of angles