Features: Corrosions-Resistant Stainless Steel: Constructed from stainless steel, this vent cover ensures extended use in marine environments without oxidation, offering superior resistance to corrosions compared to standard steel, ideal for vessels and marine facilities. Effective Ventilation Design: Features a unique vent hole structure that improves air circulation efficiency, maintaining the cabin clean, suitable for extended voyages in both warm and damp rainy periods. Simple Installation: Designed for quick and easy setup, saving time and effort, easily managed by not-experts, perfect for scenarios requiring frequent assembly and disassembly like vessel maintenance and inspection. Strong and Sturdy: Heavy stainless steel plate delivers impacts protections, safeguarding internal equipment from external harm, especially suitable for vessels operating in severe weather conditions. Wide-Ranging Application: Not limited to vessels, it can also be used in various transportation ventilation systems such as motorhome and campers, addressing ventilation needs in diverse environments for users seeking lifestyle. Specifications: Component:Stainless Steel Package Includes: 4Pcs Vent Cover 12Pcs Screw note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.