The Freudenberg-NOK Dichtomatik OR 5.109" 0.139" 90 NBR N901W is a high-quality O-ring designed for reliable sealing in various applications. Made from durable Nitrile Butadiene Rubber (NBR), this O-ring offers excellent resistance to oils and fuels, making it ideal for automotive and industrial uses. With a precise inner diameter of 5.109 inches and a cross-section of 0.139 inches, it ensures a snug fit in compatible systems. This product meets industry standards for performance and durability, ensuring long-lasting service in demanding environments.