The Freudenberg-NOK OR 3.489" 0.070" 90 NBR N901W seal is engineered for optimal sealing performance in demanding environments. Constructed from 90 durometer Nitrile Butadiene Rubber (NBR), this O-ring is highly resistant to a variety of chemicals, including oils and fuels. With a cross-section of 0.070 inches and an inner diameter of 3.489 inches, it fits perfectly in numerous applications, ensuring a tight seal. This product adheres to industry standards, making it suitable for hydraulic and pneumatic systems in automotive and industrial settings, providing a reliable solution for leak prevention.