Steel City 21 cu in Square Galvanized Steel Outlet Box Silver

Steel City 52151 N Pre galvanized steel switch box. Lighting fixtures switches receptacles. Square Box, 21 Cubic Inches, 4 Inch Square x 1-1/2 Inch Deep, 1/2 Inch and 3/4 Inch Eccentric Knockouts, Pre-Galvanized Steel, with Non-Metallic Cable Clamp (C-5), For Use with Non-Metallic Sheathed Cable