Duct Reducer For Nominal Duct Diameter 11 in 12 in Inlet Diameter 12 in Inside Diameter Not Applicable Overall Length 9 3/4 in Product Type Reducer Weight 4 lb Material Thickness 0.2 in Maximum Pressure Rating 10 in wc Maximum Temperature Rating 140 Degrees F Material PVC Seal Material Not Applicable Standards ASTM D1784 Cell Class 12454 Shape Straight Gas Appliance Category Not Applicable Outlet Diameter 11 in Overall Height 9 3/4 in Overall Width 12 in End Type Plain