Features: This premium marine ventilation window is crafted from high grade 304/316 stainless steel for outstanding erosion resistance, ideal for saltwater, humidity, and demanding marine environments, ensuring rust easy longevity. Designed with double louvers in a 115×230mm standard size, it optimizes air exchange and heat dissipation while effectively blocking rain, waves, and debris, featuring easy installation via pre drilled holes and screws for hassle easy setup. Ideal for boat owners, marine engineers, and shipbuilders seeking stable and strong ventilation solution for various vessels. Perfectly suited for installation in boat cabins, decks, engine rooms, and storage areas on yachts, fishing boats, and work vessels, serving as an efficient exhaust vent or heat dissipation cover. Its smooth, burr easy edges prevent injuries and secure compatibility with multiple ventilation systems, offering versatile, low maintenance performances for marine hardware needs. Specifications: Component : stainless steel Size: about 115x230mm/4.53x9.13inch Package Includes: 1xExhaust Cover note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.