Photo 1 of 4" Adjustable Duct Elbow 90 Degree HVAC - 30 Gauge galvanized sheet metal duct connector, for flexible round tube air ventilation & vent pipe ductwork collar piping ducting fitting 4 Inch

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Photo 1 of 4" Adjustable Duct Elbow 90 Degree HVAC - 30 Gauge galvanized sheet metal duct connector, for flexible round tube air ventilation & vent pipe ductwork collar piping ducting fitting 4 InchPhoto 2 of 4" Adjustable Duct Elbow 90 Degree HVAC - 30 Gauge galvanized sheet metal duct connector, for flexible round tube air ventilation & vent pipe ductwork collar piping ducting fitting 4 InchPhoto 3 of 4" Adjustable Duct Elbow 90 Degree HVAC - 30 Gauge galvanized sheet metal duct connector, for flexible round tube air ventilation & vent pipe ductwork collar piping ducting fitting 4 Inch