Features： 1、Sturdy Material: Made of ABS material, the vent cap is resistant to oxidation, fade and deformation, can withstand various outdoor environments, maintaining its color even after long exposure to sunlight. 2、Mesh Screen Design: The roof round ventilation cap is equipped with a mesh screen to prevent debris from entering the vehicle, providing a peaceful environment for your RV. 3、Enhanced Air Exchange: The mushroom ventilation cap facilitates fast air exchange between indoors and outdoors, providing refreshing air for the vehicle interior. Ideal for bathrooms, kitchens, warehouses, and lounge. 4、Versatile Application: The plumbing vent cap is an excellent solution for repair and ventilation of damaged or leaking vehicle roofs, suitable for marine, boats, yachts, RVs, trailers, and motorhomes. 5、Easy Installation: The round mushroom vent cap can be top mounted, comes with mounting screws, without complicated tools, saving your time and effort. Specification： Item Type: RV Mushroom Ventilation Cap Size: Approx. 75 x 155mm / 2.95 x 6.10in Installation Hole Size: Approx. 118mm / 4.65in Installation Thickness: Approx. 14mm / 0.55in Application: Suitable for RVs, campervans, motorhomes, yachts, bathrooms, kitchens, warehouses, lounges. It can quickly exchange indoor and outdoor air, providing refreshing ?air for the interior of your vehicle. If there is water leakage or local damage to the roof of your vehicle, this vent can be used as a patch to repair the damaged area, providing ventilation conditions for the interior of the vehicle while fixing the leakage. Installation Steps: 1. Confirm the position where the hole needs to be opened, clean and open a circular hole with a diameter of 118mm on the panel. 2. Insert the vent cap into the hole and apply water resistant glue around the vent. 3. Secure the vent cap with screws to complete the installation. Package List： 1 x Round Ventilation Outlet 7 x Screws