Quick-Fit dust collection duct adapter, For Nominal Duct Diameter 13 in, Inlet Diameter 13 in, Material Steel, Product Type Angle Flange Adapter, Material Thickness 20 ga, Overall Length 5 in, Maximum Pressure Rating 42 in wc, Weight 7.02 lb, For Duct Height 13 in, Flange Inner Diameter 13 1/8 in, For Duct Width 13 in, Flange Outer Diameter 16 1/8 in, Maximum Airflow 6,450 cfm, Inside Diameter 13 in, Number of Holes on Flange 8, Overall Width 16 1/8 in, Bolt Circle Diameter 15 in