Electrical Box Box Type Switch Number of Gangs 1 Bracket Type Ears Capacity 18 cu in Material Galvanized Zinc Number of 1/2 in Back Knockouts 1 Number of 1/2 in Side Knockouts 4 Clamp Type Armored Nominal Depth 3 1/2 in Nominal Length 3 in Nominal Width 2 in Color Silver Standards UL File E195978