The AS568-444 SIMRIZ SZ501 is a high-quality sealing solution with a 7 3/4" inner diameter and an 8 1/4" outer diameter, featuring a thickness of 1/4". Manufactured by Freudenberg-NOK, this seal is designed for optimal performance in various industrial applications. The SIMRIZ material provides excellent resistance to chemicals and temperature variations, ensuring durability and reliability. This product meets stringent industry standards, making it suitable for hydraulic and pneumatic systems. The SZ501 offers a secure fit, enhancing the overall efficiency of your systems.