The AS568-389 O-ring, measuring 20" ID x 20-3/8" OD x 3/16", is made from SIMRIZ SZ485 by Freudenberg-NOK. This high-quality O-ring is designed for optimal sealing in various industrial applications, providing excellent resistance to oils, chemicals, and temperature fluctuations. The precise sizing ensures a secure fit, preventing leaks and enhancing system performance. Ideal for use in hydraulic and pneumatic systems, this O-ring meets stringent industry standards, ensuring reliability and longevity in demanding environments.