Compatible Models: Compatible with Hayward CL200, CL220, and CL220BR chlorinator feeder lids. Durable Material: Made from durable rubber for long-lasting durability and reliable sealing performance. Size: Features an outer diameter of 140mm, inner diameter of 128mm, and thickness of 6mm for optimal sealing. Easy Installation: Quick and simple replacement process, no special tools required to install. Quantity and Color: Comes in a pack of 3 black O-rings for sufficient replacement and consistent performance., Manufacturer: The Lord of the Tools