Feature: 1. ROBUST DESIGN: The window is crafted from heavy duty aluminum alloy, offering a smooth, anodized and polished surface. This ensures excellent damage resistance and durability, making it ideal even in harsh marine or outdoor environments. 2. HIGH GRADE GLASS: This porthole uses 6mm thick, smoke gray tempered glass. Not only does it provide robustness and safety, but it also filters harmful UV rays while allowing ample light to enter the cabin, enhancing its brightness. 3. PUSH AND WATERPROOF: The push out opening method allows for easy ventilation and the waterproof seal keeps your cabin dry even in rainy weather. Enjoy a comfortable and dry boating experience. 4. MAXIMUM OPENING ANGLE: This skylight can be fully opened up to 90 degrees, providing ample air circulation and access to the outdoors. Experience the freedom of fresh air and natural light. 5. UPGRADED PERFORMANCE: The skylight comes with a durable stainless steel support rod and locking handle, ensuring a secure and stable opening and closing mechanism. Can be used as a replacement for boats, yachts, and RVs. Upgrade your vehicle with ease and convenience. Specification: Item Type: Boat Porthole WindowMaterial: Aluminum alloy + tempered glass +ABS+ rubber +316 stainless steel Opening Method: Push Out, with Stainless Steel Support Rod and Locking Handle Maximum Opening Angle: 90 degrees Window Size: Approx. 575x675mm / 23x27 inches Installation Opening Size: Approx. 510x610mm / 20.07x24.01 in, R45 Suitable Installation Thickness: Approx. 25-50mm / 1-2 inches Application:Suitable for Boat, Yacht, Nautical, RV, which can be used for your marine yacht RV retrofitting and more, providing a solution for your leaky, broken and unsatisfactory windows . Package List: 1 x Skylight Note: 1. The installation difficulty is a bit high, it is recommended to seek assistance from a professional engineer for the best shopping experience. 2. We will provide packaging with high hardness and all-round protection. The goods will be delivered to you in a new and undamaged state. Please be careful to avoid collisions during disassembly and assembly. 3. Please measure the dimensions before purchase to ensure that it meets your needs.