Angle Flange Adapter For Nominal Duct Diameter 12 in Inlet Diameter 12 1/8 in Material Steel Product Type Angle Flange Adapter Material Thickness 22 ga Overall Length 1 1/2 in Maximum Pressure Rating 42 in wc Weight 3.9 lb For Duct Height 12 in Flange Inner Diameter 12 1/8 in For Duct Width 12 in Flange Outer Diameter 15 1/8 in Inside Diameter 1/2 in Number of Holes on Flange 8 Overall Width 12 in Bolt Circle Diameter 14 in Minimum Pressure Rating 2 in wc Shape Straight