Standard Cowl Vents with Snap-On Deck Plates are designed for air intake or cabin ventilation when used in conjunction with a dorade box. Great for bilge ventilation with or without a blower. Promotes passive air flow by preventing mold and mildew, and keeping boat interior smell fresh. Includes snap-on deck plate and cover for use in rough weather. Constructed of UV resistant dip molded PVC. Avoid contact with acetone or strong solvents.