Electrical Box Box Type Square with Bracket Number of Gangs 2 Bracket Type H Style Capacity 30.3 cu in Material Galvanized Steel Number of 1/2 in Back Knockouts 4 Number of 1/2 in Side Knockouts 12 Clamp Type - Number of 3/4 in Back Knockouts 2 Number of 3/4 in Side Knockouts 8 Nominal Depth 2 1/8 in Nominal Length 2 1/8 in Nominal Width 4 in Color Silver Standards UL