Electrical Box Box Type Octagon Number of Gangs 2 Bracket Type - Capacity 15.5 cu in Material Galvanized Steel Number of 1/2 in Back Knockouts 3 Number of 1/2 in Side Knockouts 2 Clamp Type - Number of 3/4 in Back Knockouts 2 Number of 3/4 in Side Knockouts 2 Nominal Depth 1 1/2 in Nominal Length 4 in Nominal Width 4 in Color Silver