The Pentair Filter Body Tank Replacement O-Ring is an OEM replacement part designed to fit several Pentair filter systems, including the EasyClean DE Inground Filter Systems, Clean and Clear/Predator 75/150/200 Square Feet Filter Systems, and Warrior Filter Systems. This replacement O-ring has a diameter of 9-1/2in. OD and is made with high-quality materials to ensure a proper seal for your filter system. With this replacement O-ring, you can easily fix any leaks in your filter system and ensure that it runs smoothly and efficiently.