Pull Station Guard Spacer, Open w/Conduit Knockout Back, Indoor, Outdoor, Color Clear, Material Polycarbonate, Mounting Surface, Width 4 in, Depth 1 1/2 in, Height 6 in, For Use With Pull Stations, Call Points, Push Buttons, Operating Temp. -40 Degrees to 250 Degrees F, Standards UL, cUL, ADA, Features Converts Flush Mount Unit to A Surface Mount Unit, Includes Gasket, Mounting Hardware