Fits both conventional and "U" ground receptacles, as well as switches. Shields against rain, snow, ice, dirt, moisture. Covers automatically snap shut and seal tight with slight push. Self-sealing rubber gasket in covers and rubber "Undercoating" mat under plate give weatherproof protection. Rust-proof ABS plate with aluminized finish. Stainless steel hinge spring. Mounting hardware furnished. Note: Electrical receptacle not included.