Smoke Detector Guard, Open Back, Indoor, Color Clear, Material Polycarbonate, Mounting Flush, Width 9 in, Depth 3 3/4 in, Height 9 in, Diameter 8 3/4 in, For Use With Smoke Detectors, Operating Temp. -40 Degrees to 250 Degrees F, Standards cUL, FM Approved, UL, Includes Mounting Hardware