H&C 4RN5 4" TO 5" INCREASER (16112)

Sheet Metal Gas Vent Increaser; Type Double Wall; Larger End Size 5 Inch; Smaller End Size 4 Inch; Length 5-1/4 Inch; Material Thickness 0.012 Inch (Inner Wall), 0.018 Inch (Outer Wall); Material Aluminum (Inner Wall), Galvanized Steel (Outer Wall); Applicable Standard UL