Flange Adapter For Nominal Duct Diameter 6 in Inlet Diameter 6 5/8 in Material PVC Product Type Angle Flange Adapter Material Thickness 0.3 in Overall Length 10 in Maximum Pressure Rating 10 in wc Weight 1.5 lb Flange Inner Diameter 6 1/4 in Flange Outer Diameter 10 in Inside Diameter 6 5/8 in Number of Holes on Flange 8 Overall Width 10 in Bolt Circle Diameter 8 1/2 in Minimum Pressure Rating Not Applicable Shape Straight Outlet Diameter 10 in Overall Diameter 10 in