The Freudenberg-NOK OR 3.725" 0.210" 90 HNBR H901B seal is engineered for superior sealing performance in demanding environments. Constructed from high-grade HNBR, this seal provides exceptional resistance to heat, oil, and various chemicals, making it suitable for a wide array of industrial applications. With a diameter of 3.725 inches and a thickness of 0.210 inches, it adheres to rigorous industry standards, ensuring reliability and longevity. This seal is ideal for hydraulic and pneumatic systems, delivering a tight seal that enhances operational efficiency.