Enhance your kitchen and bathroom ventilation with this stainless steel check valve. Its easy installation process allows you to quickly upgrade your exhaust system, preventing the backflow of smoke and odors. This product is for those looking to maintain a clean home environment. Features -Color:Silver -Material:Stainless Steel -Size:23.50X23.30X4.50cm/9.24X9.16X1.77in -Size:17.60X17.60X4.50cm/6.92X6.92X1.77in -diameter: 180mm -Note:The style of the certificate label is random. -smoke barrier: effectively blocks the return of odors and smoke, keeping your kitchen and bathroom air fresh and clean -stainless steel construction: built with durable stainless steel, it resists wear and tear, ensuring longterm use without frequent replacements -Optimized ventilation: enhances the performance of range hoods and exhaust systems, promoting better airflow and a more comfortable home -Low noise functionality: designed to operate quietly, it helps maintain a peaceful and relaxing indoor environment -Quick and versatile installation: allowing for seamless integration into your existing ventilation setup Package list: 1 x valve