View 1 of 2, 10" to 4" Duct Reducer Round Reducer Duct Fitting Pipe Increaser Reducer Made From Galvanized Steel (Drain, Waste and Vent) Reducing Coupling (Metal, 10 to 4 Inch)

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View 1 of 2, 10" to 4" Duct Reducer Round Reducer Duct Fitting Pipe Increaser Reducer Made From Galvanized Steel (Drain, Waste and Vent) Reducing Coupling (Metal, 10 to 4 Inch) View 2 of 2, 10" to 4" Duct Reducer Round Reducer Duct Fitting Pipe Increaser Reducer Made From Galvanized Steel (Drain, Waste and Vent) Reducing Coupling (Metal, 10 to 4 Inch)