56 Square exposed work cover in pre-galvanized finish, features 0.0625-Inch steel construction. It comes in 2.625-Inch Dia 30 - 50-Amp receptacle configuration. Cover measuring 4-11/16-Inch x 4-11/16-Inch x 1/2-Inch, has capacity of 10.3-Cubic-Inch. It supports switches or receptacles in areas where the box is surface mountable. Cover is UL listed and CSA C22.2 certified.