The AS568-466 18.5" ID x 19" OD x 1/4" SIMRIZ SZ501 from Freudenberg-NOK is a high-performance sealing solution designed for industrial applications. This O-ring features a durable SIMRIZ material, ensuring excellent resistance to various chemicals and temperatures. With precise dimensions of 18.5" inner diameter and 19" outer diameter, it fits seamlessly into standard AS568 specifications. The 1/4" thickness provides optimal sealing capabilities, making it suitable for hydraulic and pneumatic systems. This product complies with industry standards, ensuring reliability and performance in demanding environments.