The Freudenberg-NOK 5.475" 0.210" 90 HNBR H901B O-Ring is designed for high-performance sealing applications. Made from high-quality HNBR material, this O-ring offers excellent resistance to heat, oil, and chemicals, making it ideal for various industrial uses. With a hardness rating of 90, it ensures a reliable seal under pressure. The dimensions of 5.475" in outer diameter and 0.210" in cross-section provide a perfect fit for standard applications. This O-ring complies with industry standards, ensuring compatibility with a wide range of systems and applications.