Electrical Box Box Type Round Ceiling Pan Number of Gangs 2 Bracket Type Nails Capacity 20 cu in Material Polycarbonate Number of 1/2 in Back Knockouts 6 Number of 1/2 in Side Knockouts 0 Clamp Type - - Hub Location Rated - Nominal Depth 2 1/4 in Nominal Length 3 1/2 in Nominal Width 3 1/2 in Color Black Standards UL