1、Heavy Duty Frame: The overall frame of the boat windows is made of heavy duty aluminum alloy, with a polished and anodized surface that is smooth and flat, allowing for long term outdoor use. 2、Exquisite Craftsmanship: The 6mm thick acrylic glass ensures overall durability, and the support rod and swivel fixed handle are made of 316 stainless steel, ensuring rust resistance for the entire skylight. 3、Waterproof and UV Protection: The waterproof rubber seal provides complete water tight sealing while also dampening and filtering UV rays. It allows light to enter the cabin, increasing brightness, and can also be used as a ventilation window. 4、90° Opening Angle: The marine porthole window comes with a switch locking handle and a fixed support rod, supporting an opening angle of 0‑90 degrees, allowing passengers to enjoy the scenery along the way. 5、Wide Applications: Suitable for installation with a thickness of 15mm, it can be used for boats, yachts, ships, and RVs. It can be installed as a skylight, escape window, storage compartment, roof, or anywhere else.