Angle Flange Adapter For Nominal Duct Diameter 3 in Inlet Diameter 3 in Material Stainless Steel Product Type Angle Flange Adapter Material Thickness 22 ga Overall Length 5 in Maximum Pressure Rating 42 in wc Weight 1.4 lb For Duct Height 3 in Flange Inner Diameter 3 1/8 in For Duct Width 3 in Flange Outer Diameter 5 in Maximum Airflow 345 cfm Inside Diameter 3 in Number of Holes on Flange 6 Overall Width 5 in Bolt Circle Diameter 4 1/4 in Minimum Pressure Rating 2 in wc