The Freudenberg-NOK OR 4.489" 0.070" 90 NBR N901W seal is a high-quality O-ring designed for effective sealing in various applications. Made from durable 90 durometer Nitrile Butadiene Rubber (NBR), it offers excellent resistance to oils, fuels, and other chemicals. With a cross-section of 0.070 inches and an inner diameter of 4.489 inches, this seal ensures a secure fit in hydraulic and pneumatic systems. It meets stringent industry standards, making it ideal for use in automotive, aerospace, and manufacturing sectors, providing a dependable solution for preventing leaks.