17 X 25in Boat Porthole Window Push Out Tempered Glass Aluminum Alloy Frame Waterproof 90 Deg Opening for RV Yacht 1Robust Aluminum Alloy Frame: The hatch window features a heavy duty aluminum alloy frame, the anodized surface is polished to a smooth finish. This ensures excellent rust resistance and durability, making it impervious to harsh marine or outdoor environments. 2Sturdy and Safe Tempered Glass: The translucent portion of the window is constructed with 6mm thick smoked tempered glass, ensuring strength and safety. The smoked glass filters out harmful UV rays while allowing natural light to illuminate the cabin, enhancing brightness. It can also be utilized as a ventilation window. 3Waterproof and Shockproof Design: The window frame is equipped with waterproof rubber seals, providing complete sealing and protection against water intrusion when the window is closed. The seals also offer shock absorption, enabling the window to withstand rough weather conditions. 4Stainless Steel Support and Hinge: The window assembly includes support rods and hinges made of 316 stainless steel, ensuring long durability. The window opens externally, allowing for a fully customizable opening angle from 0 to 90 degrees and can be securely fixed at any desired angle. 5Various Applications: Boat porthole window is suitable for resolving leakage, damage, or dissatisfaction with existing 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.