Feature: 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. Specification: Item Type: Boat Skylights Window Material: Aluminum alloy + nylon + tempered glass + 316 stainless steelWindow Size: Approx. 572 x 457mm / 22.52 x 17.99in Installation Opening Size: Approx. 507 x 392mm / 19.96 x 15.43in Suitable Installation Thickness: Approx. 15mm/0.59in, Or Any Thickness Extrapolated Opening Angle: Any Angle Of 0-90 Degrees Application: Suitable for Boat Yacht Nautical RV, a solution for your leaking, broken and unsatisfactory windows. Package List: 1 x Boat Skylights Window Note: 1. The installation is slightly more difficult. It is recommended to find professional engineers to assist in the installation to obtain the best shopping experience. 2. Please pay attention to avoid collision when disassembling and assembling.3. Please measure the size before purchasing to make sure it is what you need.