Features: Prevent water backflow and maintain performances for CL200 and CL220 Series chlorine feeders. Crafted from PVC material, this check valves and inlet fitting adapter assembly offer exceptional corrosion resistance, pressure tolerance, and durability. Long lasting reliability and stability in your pool or water treatments system. Designed for pool owners, swimming pool administrators, and homeowners with a passion for cleaning water. Ensures a secure and tight connection with other device, making it suitable for various users. Whether you own a private pool, manage a public swimming pool, or run hotel or club with a swimming pool, this check valves and inlet fitting adapter assembly is an essential tool for maintaining and managing your water treatments system. Say goodbye to water backflow issues and enjoy a hassle free pool experience. Invest in this reliable solution today and take control of your poo water circulation. Specifications: Material:PVC Size:Approx.3.9x2cm/1.53x0.78inches Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 2x Check Valves 2x Inlet Fitting Adapter