The Freudenberg-NOK N901W O-Ring, with a diameter of 3.487 inches and a thickness of 0.103 inches, is made from high-quality 90 durometer Nitrile (NBR) rubber. This O-Ring is specifically designed for sealing applications in hydraulic and pneumatic systems, providing excellent resistance to oils, fuels, and other chemicals. Its durable construction ensures a reliable seal, preventing leaks and maintaining system integrity. The N901W O-Ring meets industry standards for performance and reliability, making it suitable for various industrial applications.