The AS568-043 SIMRIZ SZ501 is engineered for optimal sealing performance, featuring a 3-1/2" inner diameter and a 3-5/8" outer diameter with a thickness of 1/16". This seal, produced by Freudenberg-NOK, is crafted from high-quality SIMRIZ material, known for its exceptional resistance to various chemicals and temperature extremes. It meets industry standards, ensuring compatibility with numerous applications, particularly in hydraulic and pneumatic systems. The SZ501 is designed to provide a reliable seal, enhancing the efficiency and longevity of your equipment.