This Genuine Hayward DEX2420Z8A DE Cartridge Filters System comes with all the accessories needed for efficient filtering and cleaning of in-ground pools. The package includes two rings and a manual air relief valve O-rings. It is perfect for maintaining the cleanliness of your in-ground pool without worrying about the condition of the filter. This DE Filter System is specifically designed for in-ground pools and is suitable for various types of pool types. The brand Hayward is well-known in the market for producing high-quality pool equipment and parts, and this filter system is one of them. With its efficient filtering system and easy to install accessories, this Hayward DE Filter System is a perfect choice for maintaining the cleanliness of your in-ground pool.