The Freudenberg-NOK N750FM O-Ring, with a diameter of 5.109 inches and a 0.139 inch cross-section, is made from high-quality NBR (Nitrile Butadiene Rubber). This O-Ring features a hardness of 75 durometer, providing excellent sealing capabilities in various applications. It is resistant to oils, fuels, and chemicals, making it ideal for use in automotive, industrial, and hydraulic systems. The N750FM O-Ring meets industry standards for performance and reliability, ensuring long-lasting service in demanding environments.