Stainless-Steel Louvered Ventilators are attractive, durable and easy to install. Built with 304 stainless steel, these ventilators are durable and keep unwanted elements out while allowing air to pass through. Highly polished for corrosion resistance and designed for installation as a complete unit from either inside or outside the hull. Requires Attwood 1487B collector box. Specifications Type: Louvered Material: 304 Stainless Steel Warranty: One year