Electrical Box, Box Type Square with Bracket, Number of Gangs 2, Bracket Type BOX-LOC Flush, Capacity 30.3 cu in, Material Steel, Number of 1/2 In. Back Knockouts 5, Number of 1/2 In. Side Knockouts 12, Clamp Type -, Number of 3/4 In. Back Knockouts 2, Number of 3/4 In. Side Knockouts 4, Nominal Depth 2 1/8 in, Nominal Length 4 in, Nominal Width 4 in, Color Silver, Standards File E195978, UL 514-A Listed