100mm round stainless steel wall air outlet, hemispherical cover design, windproof and rainproof. New stainless steel air outlet with insect-proof mouth and thin slices. The insect-proof net is designed to effectively prevent the entry of insects, mice, and birds, and the seal prevents leaks and unwanted airflow. Suitable for all dryer exhaust pipes, bathroom vents and kitchen hoods, air conditioners, kitchen fans and vents, all household vents, heat transfer and ventilation systems, gas and electric dryers, and various industrial uses. Very easy to install and use, please wear gloves during installation.