Feature: 1. Erosion Resistant: Made of marine grade stainless steel with polished finish, porthole window ensures rust resistance and durability in harsh marine or outdoor environments. 2. Smoke Gray Tempered Glass: 6mm thick smoke gray glass filters UV rays, while allowing light to enter the cabin, enhancing brightness and can be used as a ventilation window. 3. Unique Design: 10 inch round portlight with internal opening, fixed handle and screen, is suitable for storage, living room, lounge, bathroom or any other installation location, can be used to enhance indoor brightness or ventilation window 4. Inward 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. Scope of Application: 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: Round Porthole WindowMaterial: Stainless Steel + Tempered Glass + Abs + RubberOpening Type: Inward Opening, with Stainless Steel Fixed RingWindow Outer Size: Approx. 250mm / 9.84in Installation Opening Size: Approx. 213mm / 8.39inSuitable Installation Thickness: Approx. 26 - 36mm / 1 -1.4in Suitable for: Boat/Yacht/Nautical/RV, suitable for your boat and yacht RV conversion projects, providing solutions for your leaking, damaged, and unsatisfactory windowsInstallation Instructions: The window is an inward opening type, the glass surface with handle is installed on the cabin side, the fixed ring is installed on the exterior . Package List: 1 x Round Porthole Window 1 x Fixed Clamp 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.