The Freudenberg-NOK U959BB is a robust FKM O-ring measuring 1.375 inches in diameter and 0.187 inches in thickness, with a hardness of 75 Shore A. This O-ring is engineered for high-temperature and chemical resistance, making it suitable for demanding applications in the automotive and industrial sectors. Its precise dimensions ensure a secure fit, while its durable material composition guarantees long-lasting performance. The U959BB complies with industry standards, ensuring reliability in various sealing applications.