Universal Stopper Cover, Open Back, Indoor, Outdoor, Color Clear, Material Polycarbonate, Mounting Surface, Width 8 1/4 in, Depth 2 in, Height 4 3/4 in, For Use With Dual Action Pull Stations, Keypads for Entry Systems, Intercom Stations, Emergency Buttons, Electrical Light Switches, Duplex Plugs, Etc., Operating Temp. -40 Degrees to 250 Degrees F, Standards UL, cUL, , Features Indoor/Outdoor Cover Helps Protect Against Vandalism and Accidental Damage, Includes Mounting Hardware