The Freudenberg-NOK AS568-028 SIMRIZ SZ501 is a high-performance O-ring with an inner diameter of 1-3/8 inches, an outer diameter of 1-1/2 inches, and a cross-section of 1/16 inch. This O-ring is made from premium SIMRIZ material, known for its exceptional resistance to chemicals and high temperatures, making it ideal for demanding applications. It meets AS568 standards, ensuring compatibility with a wide range of systems. This O-ring is perfect for sealing in hydraulic and pneumatic applications, providing a reliable barrier against leaks and enhancing system efficiency.