Feature: 1. Heavy Duty Aluminum Alloy: The frame is made of heavy duty aluminum alloy and has been anodized to polish the surface to a smooth finish, resist to rust and oxidation even in harsh marine or outdoor environments. 2. Tempered Glass: The marine deck hatch window is made of thick smoke gray tempered glass to ensure the overall robustness and safety of the window, can filter out UV and ensure that light can enter the cabin, improving the brightness of the cabin, and can also be used for ventilation window. 3. Perfect Sealing: The boat push out deck hatch window is equipped with waterproof rubber rings to provide complete sealing and waterproof performance and shock absorption performance when the window is closed. 4. Convenient and Flexible: Th boat deck hatch porthole window is made of 316 stainless steel, 0 to 90 degrees can be opened at any angle, and the support is fixed at any angle for flexible use. 5. Wide Application: This hatch porthole window is suitable for boat, yacht, ship, and RV, can be used for sunroof, escape window, storage compartment, roof, or any location modification and other projects. Specification: Item Type: Marine Hatch Porthole Window Switch Type: Push Pull, with Stainless Steel Support Rod and Locking Handle Max Opening Angle: 90 degrees Window Outer Size: Approx. 425 x 525mm/17 x 21 in Installation Opening Size: Approx. 360 x 460mm x R45/14.4 x 18.4 in x R45 (Allow for a 5mm error,) Suitable Installation Thickness: Approx. 25-50mm / 1-2 in Applicable Models: Suitable for Boat/Yacht/Nautical/RV, can be used for boat yacht RV retrofit and other projects, to provide a solution for your leaking, broken and unsatisfactory window. Package List: 1 x Marine Hatch Porthole Window 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. We will provide high hardness and all‑round protection of the packaging, the goods delivered to your hands is a new and non damaged state, please pay attention to avoid collision when disassembling.3. Please measure the size before purchase to make sure it is what you need.