This is a generic model that looks exactly the same, the color may be different but the functionality is exactly the same! Part Number: ORBX2 O-Ring Compatible with: iSpring WGB22B Series Whole House Water Filtration Systems Three per pack O-Ring It is best to replace O-RING every 3-4 months, depending on the use environment, temperature, water quality pH influence. Maintain pump and filter performance and don't wait for water leakage before doing measures O-Ring Is Made of Rubber, Replace the Sealing Ring Regularly, the Filter Can Be Sealed For a Long Time and Work Better ORBX2 O-Ring Replacement for iSpring WGB22B Series Whole House Water Filter (3 Pack)