The Freudenberg-NOK OR 3.609" 90 NBR N903X seal is engineered for superior sealing performance in demanding environments. Made from high-quality Nitrile Butadiene Rubber (NBR), this O-ring features a cross-section of 0.139" and is designed to withstand various pressures and temperatures. Its precise dimensions ensure a snug fit in hydraulic and pneumatic systems, providing reliable sealing against fluids and gases. This product adheres to industry standards, making it a trusted choice for engineers and maintenance professionals seeking durable sealing solutions.