Feature 1LONG DURABILITY: Crafted from industrial grade ABS material and stainless steel support rods, our RV roof vent offers exceptional weather resistant and impact durability, making it ideal for various outdoor conditions. 2OPTIMAL SIZE AND PROTECTION: Designed for a 340x340mm opening, this motorhome roof vent comes with a stainless steel fly screen that effectively prevents fly from entering your RV. 3TIGHT SEALING: Equipped with a sealing strip to ensure a watertight fit, the adjustable stainless steel support rods allow for angle adjustments from 0 to 31.5, providing versatile installation options. 4EFFICIENT AIRFLOW: Featuring a 12V dual direction electric fan, this vent allows for easy switching between intake and venting modes, ensuring fast air circulation in areas like bathrooms, kitchens, warehouses, and lounges. 5PREFECT SOLUTION FOR WATER DAMAGE: This RV roof vent serves as an ideal solution for damaged or leaking roofs, making it suitable for a variety of applications including marine boats, yachts, RVs, trailers, and motorhomes.Item Type: Roof Vent FanMaterial: ABS +stainless steelMounting Holes Size: Approx. 13.39 x 13.39 in / 340 x 340 mmFan Dimensions: Approx. 16.54 x 16.54 x 5.28 in / 420 x 420 x 134 mmSuitable Installation Thickness: Approx. 0.79 to 2.17 in / 20 to 55 mmFunction: Equipped with 12V dual directional electricfan, one key switch for intake and venting, quickly circulate air inside the cabin, stainless steel fly screen and support rods, support rods adjustable from 0-31.5 with knob, white top cover to block sunlight, with sealing strip for water resistantsealing when closedApplication: Suitable for installation on RV, motorhome, trailer, etc., quickly exchange indoor and outdoor air, providing freshness air for the cabin Package List1 x Roof Vent Fan1 x Knob1 x ScrewNoteVentilating fan opening direction must be opposite to the direction of the front of the car, if the installation method is not followed, serious cases may be at high speed when the airflow to lift the ventilating fan cover! Cause product damage! Does not belong to its own product problems refused to aftersales, as well as no reason to return!