Electrical Box Box Type Gang Number of Gangs 4 Bracket Type - Capacity 72.8 cu in Material Galvanized Steel Number of 1/2 in Back Knockouts 6 Number of 1/2 in Side Knockouts 16 Clamp Type - Number of 3/4 in Back Knockouts 4 Number of 3/4 in Side Knockouts 16 Nominal Depth 1 5/8 in Nominal Length 4 1/2 in Nominal Width 10 7/16 in Color Silver Standards UL