Four Gang Recessed Service Floor Box, 126 Cubic Inches for Device Access and 40 Cubic Inches for Device Compartments, Length 12-1/8 Inches, Width 12-1/8 Inches, Depth 3-1/2 Inches, Compartment Size Length 5-3/4 Inches, Width 2-3/4 Inches, Depth 2-1/2 Inches, 3/4 Inch and 1-1/4 Inch Knockouts, Galvanized Steel, Delivers Power, Communications and Data from Standard Conduit with No Exposed Service Fittings