Hayward CLX200K Pool Chlorinator Lid O-Ring for CL200/CL220 Genuine Hayward Part Number: CLX200K Get ready for the pool season with preventative maintained on your pool equipment 5-1/2-inch diameter Viton O-ring for Hayward CL200 and CL220 chlorine feeder lid Seals cap to feeder body preventing chlorine gas leaks Chemical resistant