Jet Cap For Nominal Duct Diameter 18 in Gas Appliance Category Not Applicable For Duct Height 18 in For Duct Width 18 in Inlet Diameter 18 in Material Stainless Steel Product Type Jet Cap Inside Diameter 18 in Material Thickness 20 ga Weight 98 lb Maximum Pressure Rating 42 in wc Maximum Temperature Rating 1 100 Degrees F Seal Material Nitrile Standards Not Applicable Finish Not Applicable Color Silver Overall Height 40 in Shape Cap Connection Type Clamp Together