The Hayward SX220Z2 Diffuser O-Ring Replacement is a high-quality rubber O-ring designed to ensure a leak-proof seal in HVAC components. Measuring 1.75" in diameter and 4.5" in circumference, this O-ring is specifically engineered to fit various diffuser components within HVAC systems. Its primary function is to prevent leaks by creating a tight seal between two surfaces, thereby main... https://www.usapoolshop.com/sx220z2-hayward-diffuser-o-ring-replacement