Feature: 1. Robust Aluminum Alloy Frame: The porthole window is constructed with a heavy duty aluminum alloy frame that has undergone anodized surface polishing for a smooth and luxurious feel. This ensures excellent rust resistance and durability. 2. Tempered Glass: The porthole window is made of 6mm thick smoked tempered glass, providing both strength and safety. The smoked glass filters out harmful UV rays while allowing light to enter the cabin, enhancing brightness. It can also serve as a ventilation window. 3. Waterproof and Shockproof Design: The porthole window frame is equipped with waterproof rubber seals, ensuring complete sealing and protection against water intrusion when the window is closed. The seals also provide shock absorption to withstand rough weather conditions. 4. Stainless Steel Support and Hinge: The window assembly features support rods and hinges made of 316 stainless steel, guaranteeing durability. The window opens in an external push out style, allowing for a fully customizable opening angle of 0‑90 degrees and securing it at any desired angle. 5. Various Applications: The porthole window is suitable for resolving leakage, damage windows. It is ideal for boats, yachts, ships, RVs, and can be used as a skylight, escape window, storage compartment window, roof window, or for any retrofitting project. Specification: Item Type: Portlight Window Material: Aluminum alloy + toughened glass + ABS + rubber + 316 stainless steel Opening And Closing Mode: Push Out Type, With Stainless Steel Support Rod And Locking Handle Maximum Opening Angle: 90 Degrees Window External Size: Approx. 425 x 575mm / 17 x 23in Installation Opening Size: Approx. 360 x 510mm / 14.4 x 20.4in, R45 (Please Allow 3mm Error, Please Refer To The Window External Dimensions In Stock) Suitable For Installation Thickness: Approx. 25-50mm / 1-2in Applicable: For Boat, Yacht, Nautical, RV, Can Be Used For Your Boat Yacht Caravan Conversion Retrofitting And Other Projects, Provides A Solution For Your Leaky, Broken And Unsatisfactory Windows. Package List: 1 x Boat Porthole Window Note: 1. Installation difficulty is relatively high. It is recommended to seek assistance from professional engineers to ensure the best shopping experience. 2. We will provide packaging with high hardness and all round protection. The goods will be delivered to you in a new and undamaged condition. Please be careful to avoid collisions when unpacking and assembling. 3. Before purchasing, please measure the dimensions to ensure that it is what you need.