Hose Adapter For Nominal Duct Diameter 3 in Inlet Diameter 3 in Material Steel Product Type Hose Adapter Material Thickness 22 ga Overall Length 5 1/2 in Maximum Pressure Rating 42 in wc Weight 0.6 lb For Duct Height 3 in Flange Inner Diameter Not Applicable For Duct Width 3 in Flange Outer Diameter Not Applicable Maximum Airflow 345 cfm Inside Diameter 3 in Number of Holes on Flange Not Applicable Overall Width 3 in Bolt Circle Diameter Not Applicable