Feature: 1. Heavy Duty Construction: The framework is made of heavy duty aluminum alloy and the surface is anodized and polished to a smooth finish, does not erode even in harsh Marine or outdoor environments. 2. Smoke Gray Glass: The use of 6 mm thickness of smoke gray tempered glass, can filter out ultraviolet rays and ensure that light can enter the cabin, improve the brightness of the cabin. 3. Unique Design: With waterproof rubber rings to provide sealing and waterproof performance and shock absorption, with a rotating fixed handle and 316 stainless steel support rod to ensure the overall firmness. 4. Multi Function: Push out open, and rotary handle with switch lock button, can be used for 0‑90 degrees can be opened at any angle, can be used for sunroof, ventilation window, storage compartment, roof. 5. Wide Application: 457x327mm opening size, suitable for 15mm thickness or any thickness of the wall, ideal for boat, yacht, ship, and RV, can be used for your ship yacht RV retrofitting and other projects. Specification: Item Type: Boat Skylights WindowMaterial: Aluminum alloy + nylon + tempered glass + 316 stainless steel .Window Size: Approx. 522x392mm/20.6x15.4in Mounting Cut Out Size: Approx. 457x327mm/18x12.9in Applicable Installation Thickness: Approx.15mm/0.59in, or any thickness Push Out Opening Angle: 0 to 90 degrees Application: Applicable for Boat, Yacht, Marine, RV Package List: 1 x Boat Skylights Window Note: 1. Installation is difficult, it is recommended to find professional engineers to assist in installation to get the best shopping experience2. Please pay attention to avoid collision when disassembling and assembling 3. Please measure the size before purchasing to make sure it is what you need