Feature: 1. Aluminum Alloy Frame: Window is constructed with a heavy duty aluminum alloy frame. The anodized frosted surface provides a smooth and damage resistant finish, ensuring its durability and resistance to harsh marine and outdoor environments. 2. Tempered Glass: The 6mm thick smoked gray tempered glass enhances the overall strength and safety of the window. The supporting rods are made of 316 stainless steel, ensuring rust resistance and durability of the entire porthole window. 3. Waterproof and sealed: The window frame is equipped with waterproof rubber gaskets, providing complete sealing and water resistance. The sealing ring also acts as a shock absorber, bring you excellent use results. 4. Opening Mechanism: The window features a push out opening mechanism with a built in locking button. The window can be opened from 0 to 90 degrees, offering flexibility for use as portholes, side windows, ventilation windows, storage compartments, or roof windows. 5. Wide Application: With a 418mm diameter opening, the window is suitable for walls with a thickness of 15mm or any thickness. It is ideal for boats, yachts, ships, and RVs. It can be used for renovation and retrofit projects. Specification: Item Type: Boat Porthole WindowMaterial: Aluminum alloy + nylon + tempered glass + rubberWindow Size: Approx. 485mm/19.09in outer diameter Installation Opening Size: Approx. 418mm/16.45in round diameter opening Suitable Installation Thickness: Approx. 15mm/0.6in or any thicknessExternal Push Out Opening Angle: 0-90 degrees of any angleApplication: Applicable for Boat, Yacht, Nautical, RV, which can be used for your marine yacht RV retrofitting and other projects, providing a solution for your leaky, broken and unsatisfactory windows . Package List: 1 x Window Note: 1. Installation is slightly difficult, it is recommended to find a professional engineer to assist in the installation to get the best shopping experience. 2. Please pay attention to avoid collision when disassembling and assembling.3. Please measure the size before purchase to make sure it is what you need.