The AS568-426 SIMRIZ Z7257 is engineered for optimal sealing performance with a 4-5/8" inner diameter and a 5-1/8" outer diameter, featuring a thickness of 1/4". This product from Freudenberg-NOK is crafted from high-quality SIMRIZ material, known for its exceptional resistance to various chemicals and high temperatures. It is designed to meet stringent industry standards, ensuring compatibility with numerous applications, including hydraulic and pneumatic systems. The Z7257 seal guarantees a reliable and secure fit, making it an essential component for maintaining system integrity.