Square Box, 21.0 Cu.In Capacity, Plain Finish, Armored Cable (Ac)/Metal Clad Cable (Mci, Mci-A, MCC)/Flexible Metal Conduit Clamp Includes, 1/2 In;21/32 In Knockout Size, Metal (Clad Cable, Conduit Clamp) Material, 1 - Gangs, 8 - Knockouts, 25 CT Package Quantity, Square Shape, 114 LB/100;51.71 KG/100 Weight, 1-1/2 In Width