See All PV18-360 Panaramic Full Dome Plexiglas Security Mirror, 360 Degree Viewing Angle, 18" Diameter (Pack of 1) Full dome mirror helps a person see around obstacles for safety, or monitor a wide area for efficient surveillance Hangs from a ceiling and reflects a 360 degree angle image for an overhead view of blind intersections Acrylic is shatter resistant, weighs less than glass, and reflects a clear, bright image Comes with hardware needed to hang mirror from single cord suspended from ceiling