Machine Adapter For Nominal Duct Diameter 12 in Inlet Diameter 11 7/8 in Material Steel Product Type Machine Adapter Material Thickness 22 ga Overall Length 4 in Maximum Pressure Rating 42 in wc Weight 2.3 lb For Duct Height 12 in For Duct Width 12 in Overall Width 12 in Minimum Pressure Rating 2 in wc Shape Straight Outlet Diameter 12 in Overall Diameter 12 in Overall Height 12 in End Type Quick-Fit Adapter Type Machine Adapter