The Freudenberg-NOK Industrial Services Dichtomatik O-Ring, with an inner diameter of 1.725" and a cross-section of 0.210", is made from 90 durometer NBR (Nitrile Butadiene Rubber). This O-Ring is designed to provide effective sealing in a variety of applications, particularly in environments exposed to oils and chemicals. Its high-quality NBR material ensures excellent resistance and durability, meeting industry standards for performance. Ideal for automotive and industrial uses, this O-Ring guarantees a reliable seal, enhancing the efficiency of your systems.