Feature: 1. Aluminum Alloy Frame: The overall frame of the skylight is constructed from heavy duty aluminum alloy, which is anodized and features a frosted face for a premium feel. It is rust proof and oxidation resistant, ensuring long lasting performance in harsh marine or outdoor environments. 2. Sturdy and Safe: The window equipped with 6mm thick smoke grey tempered glass, providing both strength and safety. The support rod is made of 316 stainless steel, ensuring damage resistance and durability for the entire skylight. 3. Water Resistant Seal: The frame of the skylight is equipped with water resistant rings, providing complete sealing and water resistant performance, as well as shock absorption. The glass filters out UV rays while allowing light to enter, enhancing brightness inside the cabin. 4. Open Mode: The window feature outward opening design and a handle with a locking button. They can be opened at any angle from 0 to 75 degrees, making them suitable for skylights, portlights, ventilation window, storage compartments, roofs, or any desired location. 5. Easy Installation: The skylight have a 231x176mm mounting hole size and are suitable for walls with a thickness of 15mm or any other thickness. It is perfect for boat, yacht, ship, and RV applications, offering a solution for leaky, damaged, or unsatisfactory windows. Specification: Item Type: Boat Skylights Material: Aluminum alloy + Nylon + tempered glass +316 stainless steel Window Size: Approx. 240x295mm/9.44x11.61in Installation Opening Size: Approx. 176x231mm/6.92x9.09in Suitable Installation Thickness: Approx. 15mm/0.6in, or any thickness Push Out Opening Angle: 0-75 degrees of any angle Application: Suitable for Boat, Yacht, Nautical, RV, providing a solution for your leaky, broken and unsatisfactory window. Package List: 1 x Porthole Note: 1. The installation is slightly more difficult, it is recommended to find professional engineers to assist the installation to obtain the best shopping experience.2.Please pay attention to avoid collision when disassembling.3.Please measure the size before purchase to ensure that it is what you need.