H&C 3RN4 3" TO 4" INCREASER -16013

Sheet Metal Gas Vent Increaser; Type Double Wall; Larger End Size 4 Inch; Smaller End Size 3 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