Electrical Box Box Type Switch Number of Gangs 1 Bracket Type Nails Capacity 20 cu in Material Polycarbonate Number of 1/2 in Back Knockouts 4 Number of 1/2 in Side Knockouts 0 Clamp Type - - Hub Location Rated - Nominal Depth 3 1/8 in Nominal Length 2 1/4 in Nominal Width 3 7/8 in Color Red Standards UL