The AS568-466 18.5" ID x 19" OD x 1/4" SIMRIZ SZ481 O-ring by Freudenberg-NOK is designed for high-performance sealing in industrial applications. Constructed from robust SIMRIZ material, it offers excellent resistance to a wide range of chemicals and temperatures. With precise dimensions of 18.5" inner diameter and 19" outer diameter, it meets AS568 specifications, ensuring compatibility with various systems. The 1/4" thickness enhances its sealing capabilities, making it ideal for hydraulic and pneumatic applications. This product adheres to industry standards, providing reliability and durability in challenging environments.