"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, Material Type Acrylic and aluminum, View Wide angle, 20ft., Mounting Hardware Included Yes, Indoor/Outdoor Use Outdoor, Adjustable Yes, Weather Resistant Yes, Diameter in. 18. Adjustable swivel mount"