Our attractive Louvered Flush Hose Ventilators are weatherproof and easy to install. Built with injection-molded ABS plastic, these ventilators are durable and designed for straight-through air flow for venting hoses. The louvered design keeps unwanted elements out while allowing air to pass through while the low profile design is easy to mount on your boat. Drilled for #8 FH screws and backed by a one year warranty. Specifications Type: Louvered Material: Injection-molded ABS plastic Cutout Size: 3” hose Warranty: One year