Gangable device box 3 inches height x 2 inches width x 2-1/2 inches depth 16 cubic inches volume. Concentric knockouts (1/2 and 3/4 inch), mounting strap for steel stud installations and integral additional support bracket. Recessed 1 inch 1 gang. 3104KSS1X-1 DEVICE BOX 2-1/2" BX/LOOMEX ST STUD