Vent Cap For Nominal Duct Diameter 4 in Gas Appliance Category Category I Category II Category III Category IV Material Steel Product Type Vent Cap Material Thickness Not Applicable Maximum Temperature Rating Not Applicable Standards CSA Finish Galvanized Color Silver Overall Height 8 3/8 in Shape Cap Connection Type Press Fit Overall Width 8 1/4 in Material Grade Not Applicable Minimum Pressure Rating Not Applicable Screen Included No