Feature: 1. Stainless Steel Construction: The overall frame and hinges are made from marine grade stainless steel, polished to a smooth finish for corrosion resistance and durability even in harsh marine environments. 2. Smoky Grey Tempered Glass: The tempered glass ensures the window's strength and safety, filters UV rays, allows light to enter the cabin, and can be used as a ventilation window to enhance brightness inside. 3. Wide Ventilation Angle: The 12 inch round design features an inward opening style with a fixed handle and mesh barrier, allowing for easy ventilation from 0 to 180 degrees. 4. Application: The hinges provide flexible support for admiring the scenery along the way and can be installed in storage compartments, living spaces, lounges, bathrooms, or any desired location. 5. Ideal Replacement: Suitable for boats, yachts, ships, RVs, and more, this porthole can be easily installed in your marine vessel, yacht, or recreational vehicle, offering a solution for leaky, damaged, or unsatisfactory windows. Specification: Item Type: Round Inward Opening PortholeMaterial: Stainless steel + tempered glass + ABS + rubber.Switching Method: Inward open, with stainless steel fixed clamp ring Window Dimensions: Approx. φ300mm / 11.8in Mounting Cut Out Size: Approx. 262mm/10.31in Suitable Installation Thickness: 22-32mm/0.87-1.26in Fitment: Fits for Boat, Yacht, Marine, RV Applicable for ship, yacht, RV retrofit, and more Provides a solution for your leaky, broken and unsatisfactory windows Installation Instructions: The windows are inward opening, the glass side with handles is the one that is installed in the cabin, and the fixing ring is on the outside Package List: 1 x Round Inward Opening Porthole1 x Fixing Frame Note: If you are not a professional, it is recommended to find a professional engineer to assist in the installation for the best shopping experience