Rubber, it have good wear resistance and resistance, ensuring long-terms use without deformation or aging Swimming pool O-Rings is specially designed for CLX200KY, which provide sealing, effectively prevents impurities and from leaking, and ensures the of swimming pool water You can replace the O-Rings as needed, maintain the swimming pool equipment for users to change without professional maintenance personnel, saving maintenance cost and time Professional in swimming pool maintenance and management the main users, so it is necessary to check and replace O-rings regularly to the normal of swimming pool equipment