Gas Vent Wye; Type Fixed, Double Wall; Angle 45 Degree; Size 6 Inch x 5 Inch x 4 Inch; End to End Dimension 12 Inch; Material Thickness 0.012 Inch (Inner Wall), 0.018 Inch (Outer Wall); Material Aluminum (Inner Wall), G90 Galvanized Steel (Outer Wall); Applicable Standard UL; Used On Type B Gas Vent