These Acrylic Convex Safety Mirrors offer protection against intersection accidents at blind corners, between aisles, and at material-loading areas around the farmstead or elsewhere. They are shatterproof, vary in size from 12 to 36 inches in diameter, have a formed molded plastic back (making them suitable for both indoor and outdoor applications), and may be mounted to walls, ceiling, and posts using the Z or telescoping brackets that come with the product. Viewing distance is generally a few feet more than the mirror's size in inches, e.g., the viewing distance of a 12-inch-diameter convex mirror is about 14 feet.