Feature:1. Rust Resistance Frame: The entire frame and hinges of the porthole are made from marine grade stainless steel, polished to a smooth finish, ensuring a sleek appearance and long lasting resistance to rust, even in challenging marine or outdoor conditions.2. Anti UV Tempered Glass: The sturdy 6mm smoke gray tempered glass offers UV filtration while allowing light to enter the cabin, enhancing brightness. It can also be used as a ventilation window.3. Oval Shape and with Screen: With 18.11 x 7.87in oval shape design, with fixed handle and screen, the porthole is suitable for storage compartments, living spaces, lounges, bathrooms, enhancing indoor brightness or serving as a ventilation window.4. Adjustable Opening Angle: The porthole window adopts inward opening, and can open from 0 to 180 degrees, with stainless steel hinges allowing for flexible angle fixing to enjoy scenic views.5. Easy Installation: With a applicable installation thickness of 26‑36mm, this porthole is suitable for boats, yachts, ships, and RVs, offering a solution for leaking, damaged, or unsatisfactory windows.Specification:Item Type: Oval Boat PortholeMaterial: Stainless steel + tempered glass +ABS+ rubberSwitching Mode: Inward opening type, with stainless steel fixing clamp ringWindow Size: Approx. 460 x 200mm / 18.11 x 7.87inInstallation Hole Size: Approx. 411 x 152mm / 16.18 x 5.98inSuitable for Installation Thickness: Approx. 26 - 36mm / 1 - 1.4in Application: for Boat/Yacht/Nautical/RV, can be used for your boat yacht RV retrofitting and other projects, to provide a solution for your leaking, broken and unsatisfactory WindowsInstallation Instructions: The window is an inward opening type, the glass surface with the handle is installed in the cabin, and the fixing clamp ring is installed on the outside.Package List:1 x Oval Inward Opening Porthole1 x Fixed Clamping FrameNote:Installation is slightly difficult. If you are not a professional, we recommend seeking assistance from a professional engineer for the best shopping experience.