Duct Tee For Nominal Duct Diameter 12 in Inlet Diameter 12 in Material Steel Overall Length 21 1/2 in Product Type Tee Material Thickness 24 ga Weight 8.95 lb Maximum Pressure Rating 3 in wc Maximum Temperature Rating 212 Degrees F For Duct Height 10 3/4 in Shape Tee End Type Plain/Crimped For Duct Width 10 3/4 in Gas Appliance Category Not Applicable Maximum Airflow Not Applicable Inside Diameter 12 in Minimum Pressure Rating 3 in wc Color Silver Outlet Diameter 12 in