Experience reliable sealing with this versatile rubber O-ring, designed to fit a wide range of applications. Crafted with precision, it measures 2-1/2 inches in outer diameter and 2-1/8 inches in inner diameter, with a thickness of 3/16 inches. This pack of 20 ensures you always have a durable solution on hand for plumbing, automotive, or industrial tasks, providing an essential component for leak prevention and equipment maintenance.