The Freudenberg-NOK 4.850" 90 HNBR O-Ring is engineered for superior sealing performance in demanding environments. Made from high-quality HNBR, this O-ring is resistant to heat, oil, and various chemicals, making it perfect for industrial applications. With a diameter of 0.210" and a hardness of 90, it provides a reliable seal under pressure. This O-ring meets industry standards for durability and performance, making it suitable for hydraulic and pneumatic systems. Its precise dimensions ensure compatibility with a wide range of applications, providing a dependable sealing solution.