Thomas & Betts RS18-CC Pre-Galvanized Steel Outlet Box Cover 4 Inch x 4 Inch x 1/2 Inch Steel City® Surface Cover; Square; Raised; 4-Inch Size; 1/2-Inch Raised; 5 Cubic-Inch Capacity; Hot Rolled ASTM G-90-U, AISI C-1008 0.062-Inch Steel Material; Galvanized Finish; For (1) Ground Fault Receptacle, (1) Toggle Switch; UL 514-A, CSA Approval; Federal Specification W-J-800 Applicable Standard; 25 Standard Package.