Features 1、Heavy Duty Frame: The frame is made of heavy duty aluminum alloy with an anodized surface that will not be eroded even in harsh offshore links or outdoor environments. 2、Tempered Glass: 6mm thick smoky grey tempered glass (E009335 certified) filters out UV rays while ensuring that light can enter the cabin and increase the brightness of the cabin. 3、Strong Sealing: The frame has a waterproof rubber ring, the sealing waterproof performance is strong, the support rod and hinge are made of 316 stainless steel, corrosion resistance and durability. 4、Window Design: 475x475mm square shape design, can be opened 0‑90 degrees, the support rod is designed with a rotary fixed knob, which can fix any angle support, convenient to enjoy the scenery. 5、Application: Suitable for installation from 3‑23mm wall thickness, suitable for boats, yachts, and motorhomes, can be used for skylights, escape windows, storage boxes, roofs or more. Specification Item Type: Boat Ventilation Hatch Window Material: Aluminum alloy + tempered glass + ABS + rubber Opening Method: Push out type, with stainless steel support rod and fixed handle Window Size: Approx. 475x475mm/18.70x18.70in Installation Opening Size: Approx. 410x410mm/16.14x16.14in, R45-4 Suitable Installation Thickness: 3-23mm/0.12-0.91in Application: Suitable for Boat, Yacht, Nautical, RV, which can be used for your marine yacht RV retrofitting and more, providing a solution for your leaky, broken and unsatisfactory windows Package List 1 x Boat Ventilation Hatch Window