Hayward CL200 Chlorinator Lid Oring CL200 & CL220 Fits Hayward CL200 Chlorinator Lid O rings CL200 & CL220 Aladdin After Market Replacement O-ring O-231V Hayward OEM Part Number CLX200K Not Viton or Buna material - Peroxide Cured EPDM! Most chemical resistance to Chlorine! Professor Foam is a registered Trademarked Brand, if order arrives in anything else please report since it its not from this ad and is not a authorized seller of Professor Foam Products