The Freudenberg-NOK OR 4.487" 90 NBR N903X seal is a high-quality sealing solution designed for optimal performance in various applications. Constructed from 90 durometer Nitrile Butadiene Rubber (NBR), it provides superior resistance to oils and fuels, making it suitable for automotive and industrial uses. With a thickness of 0.103", this seal fits standard sizes perfectly, ensuring a reliable seal to prevent leaks. This product meets industry standards, guaranteeing quality and performance in demanding environments.