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、Fine Workmanship: The 6mm thick smoky gray tempered glass ensures overall sturdiness and the support bars are manufactured from 316 stainless steel to ensure that the skylight is rust resistant throughout. 3、Waterproof and UV Proof: Equipped with waterproof rubber rings to ensure the sealing performance when the window is closed, the smoke gray glass filters UV rays while ensuring that light can enter the room. It can also be used for ventilation. 4、90° Opening Angle: Portlight window handle with switch lock knob and fixed support rod, supports 0‑90 degree angle opening, can be fixed at any angle to support, 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.