The Freudenberg-NOK N903X O-Ring, with a diameter of 2.550 inches and a cross-section of 0.103 inches, is made from 90 durometer NBR (Nitrile Butadiene Rubber). This O-Ring is designed for optimal sealing performance in various applications, particularly where resistance to oils and chemicals is critical. Its robust construction adheres to industry standards, ensuring a secure seal in automotive and industrial machinery. The NBR material provides excellent durability, making it a reliable choice for demanding environments.