The Vevor 4-inch round wall vent cover is designed to improve airflow while helping protect vent openings from rain, debris, and small animals. Made from SUS304 stainless steel with a black finish, it offers durable performance for use with dryers, bathrooms, kitchens, garages, basements, and similar spaces. Its louvered design and built-in protection screen support reliable everyday ventilation. Pre-drilled holes make installation easier on a variety of wall surfaces. This 2-pack is suited for both residential and utility applications.