Durable Stainless Steel Material: Made of stainless steel, these grilles are built to last, providing a sturdy and durable solution. They can withstand various weather conditions and remain rust-proof, ensuring long-term use. 【Effective Insect Protection】Featuring a fine mesh design, these grilles effectively prevent insects from entering your room through the flange. Enjoy a pest-free environment and a peaceful living space. Promotes Air Circulation: Install these grilles on your exterior wall to promote good air circulation inside and out. Improves ventilation and ensures a fresh and healthy atmosphere in your living or working space. Easy Installation: The installation process is simple and hassle-free. Simply insert the grille into the round hole on the exterior wall. For added stability, it can be secured with glue or cement. Enjoy easy installation without any complications. Versatile Use: These grilles are suitable for a wide range of applications, including residential,