The Freudenberg-NOK Dichtomatik OR 4.225" is a high-quality O-ring made from 90 NBR (Nitrile Butadiene Rubber), designed for reliable sealing in various applications. With a diameter of 4.225 inches and a cross-section of 0.210 inches, this O-ring is engineered to withstand a range of pressures and temperatures, making it suitable for industrial use. The NBR material offers excellent resistance to oils, fuels, and other chemicals, ensuring durability and longevity. This O-ring complies with industry standards, providing peace of mind for critical applications.