Duct Reducer For Nominal Duct Diameter 20 in 22 in Inlet Diameter 22 in Inside Diameter 22 in Overall Length 8 in Product Type Reducer Weight 39.5 lb Material Thickness 20 ga Maximum Pressure Rating 42 in wc Maximum Temperature Rating 1 100 Degrees F Material Stainless Steel Seal Material Nitrile Standards Not Applicable Shape Round Gas Appliance Category Not Applicable Maximum Airflow 18 480 cfm Outlet Diameter 20 in Overall Height 12 in Overall Width 22 in