Sea Dog Stainless Steel Round Louvered Vent This Sea Dog Stainless Steel Louvered Air Vent is constructed of corrosion-resistant stamped 304 stainless steel. Allows air in while keeping water out. Stainless steel round louvered vent. Measures 5 overall with 4 12 diameter vent area. Installs with 4 6 FH fasteners not included. California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Details Google Product Type Ventilation Product MPN 331425-1 Product UPC 035514331128 F