The Freudenberg-NOK O-Ring is made from high-quality NBR (Nitrile Butadiene Rubber) with a durometer rating of 75. This O-Ring measures 5.609 inches in diameter and 0.139 inches in cross-section, making it ideal for various sealing applications. NBR is known for its excellent resistance to oils, fuels, and other chemicals, ensuring durability and reliability in demanding environments. This O-Ring is suitable for use in automotive, industrial, and hydraulic systems, meeting industry standards for performance and safety.