The AS568-241 SIMRIZ SZ501 is engineered for optimal sealing performance with a 3-7/8" inner diameter and a 4-1/8" outer diameter, featuring a thickness of 1/8". This seal, produced by Freudenberg-NOK, is crafted from high-quality SIMRIZ material, known for its exceptional resistance to various chemicals and temperatures. It is designed to meet stringent industry standards, ensuring compatibility with numerous applications, including hydraulic and pneumatic systems. The AS568-241 seal guarantees a reliable and effective seal, enhancing the longevity and efficiency of your equipment.