Wire Tunnel, Non-Metallic, For 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 and Four Gang Recessed Service Floor Box, 124 Cubic Inches for Device Access and 72/52 Cubic Inches for Device Compartments, Length 12-1/8 Inches, Width 14 Inches, Depth 4-1/2 Inches, Compartment Size Length 5-3/4 Inches Width 3-3/4 and 2-1/4 Inches and Depth 3-3/8 Inches, 3/4 Inch, 1-1/4 Inch, and 2 Inch Knockouts, Cast Iron, For Audio Visual Applications