Electrical Box Box Type Round Ceiling Pan Number of Gangs 1 Bracket Type - Capacity 3.9 cu in Material Galvanized Zinc Number of 1/2 in Back Knockouts 1 Number of 1/2 in Side Knockouts 0 Clamp Type NM-B Nominal Depth 1/2 in Nominal Length 3 3/8 in Nominal Width 3 3/8 in Color Silver Standards UL File E195978