Gas Vent Pipe Swivel Tee; Type Double Wall, Round, Reducer; Applicable Standard UL 441, CUL, NFPA 54/211; Size 6" x 5" x 4"; End to End Dimension 12.17"; Material Thickness 0.012" Inner Wall, 0.018" Outer Wall; Material Aluminum Alloy Inner Wall, G90 Galvanized Steel Outer Wall; End Connection Male Threaded; Outlet Size 6.442" x 5.5" x 4.505"; Warranty 1 Year Limited