Feature: 1. Durable Construction: Constructed of marine grade stainless steel for the overall frame and hinges, ensuring corrosion resistance and durability, provides a pleasant touch feeling. 2. Smoky Gray Tempered Glass: The smoky gray tempered glass ensures the overall robustness and safety, filtering UV light and allowing light into the cabin, thus improving cabin brightness. 3. Oval Inward Opening: Measuring 460x200mm, the oval shaped window features an inward opening design with fixed handles and a mesh barrier, providing protection from dirt. 4. Wide Opening Angle: The window can be opened at any angle, from 0 to 180 degrees, with hinges that can support any angle for enjoying scenic views along the way. 5. Application: Suitable for storage cabins to living rooms, restrooms, bathrooms, or anywhere you need a window, to enhance indoor brightness or require an air exchanging window. 6. Easy Installation: The porthole is compatible for installation with a thickness of 26‑36mm, fits for boat, yacht, ship, and RV, provides a perfect solution for leaky, damaged or unsatisfactory windows. Specification: Item Type: Boat Porthole WindowMaterial: Stainless steel + tempered glass + ABS + rubber.Opening Method: Inward opening, with stainless steel hinge and fixed handle Window Size: Approx. 460x200mm/18.11x7.87in Installation Opening Size: Approx. 408x148mm/16.06x5.83in Suitable Installation Thickness: 26-36mm/1.02-1.42in Fitment: Fits for Boat, Yacht, Marine, RV Can be used for projects such as ship, yacht, RV retrofit, etc., providing a solution for your leaky, broken and unsatisfactory windows Installation Instructions: Inward opening, and the glass surface with handles is the surface installed in the cabin Package List: 1 x Boat Porthole Window1 x Fixing Frame Note: Installation may be difficult. If you are not a professional, we recommend seeking assistance from a professional engineer for the best shopping experience.