"The See All Outdoor Convex Safety Mirror helps you avoid accidents with a wide angle view. Mirror is curved to give user a 160 viewing angle. Increases traffic safety for factories and warehouses. Assists security and surveillance for retail stores and offices. Outdoor acrylic mirror is safe, durable, lightweight, provides good reflectivity and is easy to install. Has vinyl-coated aluminum frame with weatherproof ABS plastic backing. Mirror comes with adjustable swivel wall mounting bracket. U.S.A. Viewing Angle deg. 160, Indoor/Outdoor Use Outdoor, Material Type Acrylic and aluminum, View Wide angle, 20ft., Adjustable Yes, Diameter in. 18, Weather Resistant Yes, Mounting Hardware Included Yes. Adjustable swivel mount"