High-quality materials: The ventilation grilles are made of high-quality stainless steel, which is anti-corrosion, anti-rust and oxidation-resistant, and is not easily deformed. The surface is smooth and the curvature of the edges is natural, will not hurt your fingers when installing. Air circulation:Honeycomb design,These circular air vents are designed to make circulate air in your cabinets, shed, provide adequate ventilation, redirect air away from vent, maintain airflow to prevent moisture and mildew, while keeping insects such as cockroaches out enter. Easy to Install:The inner ring of the product is designed with a buckle. When installing, use a tool to protrude the buckle outward, then insert it into the mounting hole. Multi-purposeThey are used for storage shelter, suffice as a mesh soffit vent, also can be used in aquarium covers/solar generator/PC case/bedroom closets/cabin storage/kitchen cabinets for ventilation. The package includes 10-Pack of vent covers. After-Sales Quality:if you have any problem with the product, please email us, we will reply you within 12 hours and help you solve problems as quickly as possible.