Electrical Box Box Type Square Number of Gangs 2 Bracket Type - Capacity 30.3 cu in Material Galvanized Steel Number of 1/2 in Back Knockouts 1 Number of 1/2 in Side Knockouts 6 Clamp Type Armored Number of 3/4 in Side Knockouts 2 Nominal Depth 2 1/8 in Nominal Length 4 in Nominal Width 4 in Color Silver Standards UL