Perkos Clamshell Ventilators are versatile and easy to install. Built with chrome-plated brass, these vents are durable and attractive solutions to the cabin or below deck ventilation. Depending on the size, location and mounting position, clamshell vents work well for covering cable pass-through holes, to shield compartment vent holes and blower exhaust openings. These inexpensive and compact vents add a touch a style while shielding cable or covering vents from water. Specifications Type: Passive clamshell vent Material: Chrome-plated brass Warranty: Five years