See All PLXO30SSB Circular Acrylic Outdoor Convex Security Mirror with Stainless Steel Back, 30" 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 Stainless steel backing for resistance to impact, fatigue, wear, and weather in outdoor applications with extreme temperatures or high winds Comes with mounting hardware that makes the mirror angle adjustable after installation