The Freudenberg-NOK AS568-390 is a high-quality SIMRIZ SZ484 seal with a 21" inner diameter and a 21-3/8" outer diameter, featuring a thickness of 3/16". This seal is designed for durability and reliability in various industrial applications. Made from premium materials, it ensures excellent resistance to chemicals and temperature variations, making it suitable for demanding environments. The AS568-390 standard ensures compatibility with a wide range of systems, providing a secure fit and optimal performance. Ideal for use in hydraulic and pneumatic systems, this seal is a crucial component for maintaining system integrity.