This 135 MM ID X 5 MM CS Nitrile (Buna) Rubber Metric O-ring from Freudenberg-NOK is engineered for superior sealing performance. With a durometer rating of 80, it offers excellent resistance to oils, fuels, and other chemicals, making it ideal for automotive and industrial applications. The O-ring's precise dimensions ensure a snug fit, preventing leaks and maintaining system integrity. Its durable construction meets ISO standards, ensuring reliability in high-pressure environments. This O-ring is a perfect choice for various sealing applications, providing long-lasting performance and durability.