3 3/4" height, 2 1/2" deep, 14" cubic capacity per gang. MBS-1-K 2" width. Concentric conduit knockouts (8). MBS-2-K 3 13/16" width. Concentric conduit knockouts (12). MBS-3-K 5 10/16" width. Concentric conduit knockouts (16). MBS-4-K 7 7/16" width. Concentric conduit knockouts (20). MBS-5-K 9 1/4" width. Concentric conduit knockouts (24). MBS-6-K 11 1/16" width. Concentric conduit knockouts (28). MBS-P Partition for MBS boxes (2 to 4 gang only). 3 3/4" height, 3 1/2" deep, 21" cubic capacity per gang. MBD-1-K 2" width. Concentric conduit knockouts (10). MBD-2-K 3 13/16" width. Concentric conduit knockouts (16). MBD-3-K 5 10/16" width. Concentric conduit knockouts (22). MBD-4-K 7 7/16" width. Concentric conduit knockouts (28). MBD-5-K 9 1/4" width. Concentric conduit knockouts (34). MBD-6-K 11 1/16" width. Concentric conduit knockouts (40). MBD-P Partition for MBD boxes (2 to 4 gang only).