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 Red, Standards UL