The AS568-138 SIMRIZ SZ501 seal features a 2-1/8" inner diameter and a 2-5/16" outer diameter, with a thickness of 3/32". Manufactured by Freudenberg-NOK, this seal is made from high-performance SIMRIZ material, known for its excellent chemical and temperature resistance. This product is compliant with industry standards, making it suitable for a variety of applications, including hydraulic and pneumatic systems. The AS568-138 is designed to provide a reliable seal, enhancing the performance and durability of your machinery.