Electrical Box, Box Type Octagon, Number of Gangs 1, Bracket Type Not Applicable, Capacity 11.8 cu in, Material Steel, Number of 1/2 In. Back Knockouts 1, Number of 1/2 In. Side Knockouts 4, Nominal Depth 1 1/2 in, Nominal Length 3 1/2 in, Nominal Width 3 1/2 in, Color Gray, Standards UL Listed