The AS568-251 SIMRIZ SZ498 is a robust sealing solution with a 5-1/8" inner diameter and a 5-3/8" outer diameter, featuring a thickness of 1/8". This product from Freudenberg-NOK is constructed from high-quality SIMRIZ material, known for its superior resistance to chemicals and high temperatures. It complies with industry standards, making it suitable for a variety of applications, including hydraulic and pneumatic systems. The SZ498 seal ensures a reliable fit, contributing to the efficiency and longevity of your machinery.