The AS568-345 SIMRIZ SZ134 O-Ring features a 4" inner diameter and a 4-3/8" outer diameter with a thickness of 3/16". Manufactured by Freudenberg-NOK, this O-Ring is designed for high-performance sealing applications. The SIMRIZ material offers excellent resistance to chemicals and high temperatures, making it suitable for various industrial applications. This O-Ring complies with industry standards, ensuring compatibility with a wide range of systems. Ideal for use in hydraulic and pneumatic systems, it provides a secure seal to prevent leaks and maintain system integrity.