The Freudenberg-NOK N901W O-Ring is a premium sealing solution made from NBR (Nitrile Butadiene Rubber). With a diameter of 4.475 inches and a thickness of 0.275 inches, this O-Ring is designed for high-performance applications requiring resistance to oils and fuels. Its 90 Shore A hardness rating ensures durability and effective sealing under pressure. This O-Ring complies with relevant industry standards, making it suitable for a variety of systems and applications, ensuring reliable performance in demanding environments.