Photo 1 of PATIKIL 7 Inch to 4 Inch Duct Reducer, 2 Pcs Galvanized Steel Round Air Duct Reducer Crimped Pipe Increaser Adapter Connector Fitting Coupling for HVAC, Ventilation Systems

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Photo 1 of PATIKIL 7 Inch to 4 Inch Duct Reducer, 2 Pcs Galvanized Steel Round Air Duct Reducer Crimped Pipe Increaser Adapter Connector Fitting Coupling for HVAC, Ventilation SystemsPhoto 2 of PATIKIL 7 Inch to 4 Inch Duct Reducer, 2 Pcs Galvanized Steel Round Air Duct Reducer Crimped Pipe Increaser Adapter Connector Fitting Coupling for HVAC, Ventilation Systems