Captain O-Ring LLC - Replacement for Pentek, Pentair Water 151122(T) Thick Size Big Blue O-Ring Buna-N ORing (3 Pack) Part: Pentek Water 151122 O-Ring (3 Pack) Color: Black Material: Buna-N (nitrile butadiene rubber) OEM UPC: 051678511220 , 885343762095 Manufactured and Warrantied by Captain O-Ring LLC, with decades of experience in the sealing and chemical industry.