Angle Flange Adapter For Nominal Duct Diameter 24 in Inlet Diameter 24 in Material Steel Product Type Angle Flange Adapter Material Thickness 20 ga Overall Length 5 in Maximum Pressure Rating 42 in wc Weight 30 lb For Duct Height 24 in Flange Inner Diameter 24 1/8 in For Duct Width 24 in Flange Outer Diameter 26 1/8 in Maximum Airflow 21 995 cfm Inside Diameter 24 in Number of Holes on Flange 12 Overall Width 26 1/8 in Bolt Circle Diameter 25 7/8 in