Electrical Box Box Type Square Number of Gangs 2 Bracket Type Nails Capacity 18 cu in Material PVC Number of 1/2 in Back Knockouts 8 Number of 1/2 in Side Knockouts 0 Clamp Type - - Hub Location Rated - Nominal Depth 1 1/2 in Nominal Length 3 in Nominal Width 4 in Color Gray Standards UL