Feature: 1. LONG DURABILITY: Made from engineering grade ABS material, this ventilation lid offers excellent weather resistance, stability, and impact resistance, making it suitable for various outdoor environments. 2. ADJUSTABLE AND SEALED: Equipped with a stainless steel support rod that can be adjusted from 0‑31.5°, this roof vent ensures proper angle support. Comes with a seal strip to ensure water resistant sealing. 3. EFFECTIVE AIR CIRCULATION: Easily exchange indoor and outdoor air with this roof vent, providing clean air for your vehicle interior. Ideal for installation in bathrooms, kitchens, warehouses, and rest areas. 4. DEBRIS BLOCKING: 340x340mm opening size and suitable for top mounting, equipped with stainless steel net screen, effectively prevent flying objects and debris from entering the compartment. 5. VERSATILE USAGE: Solve roof damage and leakage issues with this roof vent, suitable for marine boats, yachts, RVs, trailers, motorhomes, and more. Improve ventilation while repairing leaks in your vehicle interior. Specification: Item Type: Roof Ventilation Cover Cutout Size: Approx. 340x340mm / 13.39x13.39in Vent Dimensions: Approx. 420x420x134mm / 16.54x16.54x5.28in Compatible Installation Thickness: Approx. 20-55mm / 0.79-2.17in Features: Equipped with stainless steel screen and support rods, adjustable support rods from 0-31.5° with knob, white top cover to block sunlight with sealing strip for water resistant seal. Can be used as a ventilator and repair part for leaking roofs. Fitment: Suitable for RV, Camping Vehicle, Motorhome, Trailer, Caravan Installation Steps: 1. Determine installation position and mark it 2. Drill a hole with a 340x340mm dimension 3. Insert vent into the prepared hole 4. Install fixing clip frame and secure with screws to complete installation Note: If you have a leaking or localized hole in the roof of your compartment, this vent can be used as a patch piece to install in the damaged location, providing ventilation inside the compartment and repairing the hole at the same time.. Package List: 1 x RV Roof Vent 1 x Support Rod Knob 1 x Knob Fixing Screw Note: The opening direction of the exhaust vent must be opposite to the direction of the car's front. If not installed correctly, serious damage may occur as the airflow during high speed driving may lift the exhaust vent cover. This damage is not covered by the product after sales, and no returns or exchanges will be accepted without valid reasons.