See All PVS24-180 Mr. Steely Panaramic Full Dome Steel Security Mirror, 180 Degree Viewing Angle, 24" Diameter (Pack of 1) Half dome mirror helps a person see around obstacles for safety, or monitor a wide area for efficient surveillance Mounts on a wall and reflects a 180 degree angle image for an overhead view of 3-way intersections 20-gauge, grade 304 stainless steel, nickel- and chrome-plated for a corrosion and weather resistant surface that reflects a clear, bright image Comes with wall-mounting hardware for convenient installation