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