Electrical Box, Box Type Masonry, Number of Gangs 3, Bracket Type -, Capacity 47.8 cu in, Material Steel, Number of 1/2 In. Back Knockouts 3, Number of 1/2 In. Side Knockouts 10, Clamp Type -, Number of 3/4 In. Back Knockouts 3, Number of 3/4 In. Side...