The Freudenberg-NOK N901W O-Ring, with a diameter of 0.475" and a cross-section of 0.210", is made from 90 NBR (Nitrile Butadiene Rubber). This O-Ring is designed for effective sealing in various applications, offering excellent resistance to oils, fuels, and chemicals. Its durable construction ensures long-lasting performance in hydraulic and pneumatic systems, meeting industry standards for reliability and compatibility. The NBR material provides superior wear resistance, making it ideal for challenging environments.