Angle Flange Adapter For Nominal Duct Diameter 22 in Inlet Diameter 22 in Material Steel Product Type Angle Flange Adapter Material Thickness 20 ga Overall Length 5 in Maximum Pressure Rating 42 in wc Weight 26.05 lb For Duct Height 22 in Flange Inner Diameter 22 1/8 in For Duct Width 22 in Flange Outer Diameter 25 1/8 in Maximum Airflow 18 480 cfm Inside Diameter 22 in Number of Holes on Flange 12 Overall Width 25 1/8 in Bolt Circle Diameter 23 3/4 in