Hose Adapter, For Nominal Duct Diameter 20 in, Inlet Diameter 20 in, Material Stainless Steel, Product Type Hose Adapter, Material Thickness 20 ga, Overall Length 5 1/2 in, Maximum Pressure Rating 42 in wc, Weight 3.9 lb, For Duct Height 20 in, Flange Inner Diameter Not Applicable, For Duct Width 20 in, Flange Outer Diameter Not Applicable, Maximum Airflow 15,270 cfm, Inside Diameter 20 in, Number of Holes on Flange Not Applicable, Overall Width 20 in, Bolt Circle Diameter Not Applicable