The AS568-371 SIMRIZ SZ501 is engineered for high performance, featuring an 8-1/2" inner diameter and an 8-7/8" outer diameter with a thickness of 3/16". Manufactured by Freudenberg-NOK, this seal is crafted from durable materials that offer excellent resistance to chemicals and temperature extremes. It meets industry standards, ensuring compatibility with a wide range of applications, particularly in hydraulic and pneumatic systems. The SZ501 provides a reliable seal, enhancing the efficiency and longevity of your equipment.