Electrical Box, Box Type Switch, Number of Gangs 1, Bracket Type Adjustable, Capacity 21 cu in, Material PVC, Number of 1/2 In. Back Knockouts 0, Number of 1/2 In. Side Knockouts 0, Clamp Type Non-Metallic Sheathed Cable, Number of 1 In. Side Knockouts 0, Number of 3/4 In. Back Knockouts 0, Number of 3/4 In. Side Knockouts 0, Zip Mount Retainers At Back Hub Location, Number of Hubs 2, Rated Indoor, Nominal Depth 3 3/8 in, Nominal Length 3 3/4 in, Nominal Width 3 7/8 in, NEMA/IEC Frame NEMA OS-2