Hayward, Chlorinator/Feeder (VITON) Lid Replacement O-Ring (CLX200K) Fits: CL200/CL220, Model: CLX200K, Home & Garden Store Fits: Hayward CL200 and CL220 chlorine feeder lid 5-1/2-inch diameter Viton O-ring for Chemical resistant CLX200K o'ring will arrive folded over in sealed poly bag with header, anything less is not a TORK brand