Our Slotted Ventilators are weatherproof and easy to install. Built with injection-molded ABS plastic, these ventilators are durable and designed to keep unwanted elements out while allowing air to pass through. Easy to mount on your boat, drilled for #8 FH screws and backed by a one year warranty these affordable vents are a great replacement for old vents on your boat. Specifications Type: Louvered Material: Injection-molded ABS plastic Dimensions: 4 3/4"W x 13 1/4"L Cutout Size: 3 5/8”W x 12 1/8”L Warranty: One year