1Moisture Prevention: The boat cowl ventilator could keep good ventilation which will remove moisture from the boat interior, bringing a comfortable environment. 2Powerful Function: The heavy duty marine intake cowl ventilator can greatly help keep bilges stay odorless and prevent rust, prolong its service life. 3Exquisite Workmanship: The marine exhaust cowl ventilator is professionally designed with classic appearance, well matched with the overall style of your vehicle. 4Wide Application: The intake cowl ventilator can be used to various kinds of boats and yachts, commonly installed in marine cockpit, engine ventilation. 5 Materials: The boat cowl vent is manufactured by premium 304 stainless steel with high strength, ensuring dependable strength, durability and performance.