Galvanized 4" Square Drawn Electrical Box, 1-1/2" Deep Electrical Junction Box with Ten 1/2" and Six 3/4" Knockouts, Raised Grounded, Metal Electrical Box, 21.0 Cu. in. Capacity

Material: The electrical box is made of 1/16'' thick galvanized steel, ensure durability and effectively, acceptable for use in 2-hours fire rated walls. | Knockouts: Electrical box has ten 1/2'' knockouts and six 3/4'' knockouts. (There are eight 1/2'' and four 3/4'' side knockouts, and two 1/2'' and two 3/4'' bottom knockouts, Raised Ground). | Size: 4-inches square, 1-1/2 inches depth, square drawn electrical box has a capacity of 21.0 cubic inches. The trade size of the box is 2-gang, a single toggle switch cover can only accommodate 1-gang. | Widely use: This 4" square electrical box is installed in ceilings or walls for lighting fixtures, widely used in various buildings like offices/schools/electrified railways and power grid wire insulation protection. | UL listed, item included 12 pieces 4inch square electrical box, more size drown boxes are on the way