The Freudenberg-NOK OR 3.984" 90 NBR N901W seal is a high-quality sealing solution tailored for industrial applications. Made from durable Nitrile Butadiene Rubber (NBR), it offers excellent resistance to oils and chemicals, ensuring long-lasting performance. With a thickness of 0.139" and a diameter of 3.984", this seal adheres to strict industry standards, providing a reliable seal in various environments. Its design ensures compatibility with multiple systems, making it a versatile choice for engineers and maintenance professionals.