The Freudenberg-NOK H901B O-Ring is a high-performance sealing solution made from 90 durometer HNBR (Hydrogenated Nitrile Butadiene Rubber). With a cross-section of 0.210 inches, this O-Ring is designed for durability and resistance to heat, oil, and chemicals, making it ideal for various industrial applications. It meets industry standards for quality and reliability, ensuring a secure seal in demanding environments. The O-Ring's dimensions are optimized for a wide range of fittings and connections, providing excellent sealing capabilities in hydraulic and pneumatic systems.