The AS568-465 18" ID x 18.5" OD x 1/4" SIMRIZ Z7257 O-ring from Freudenberg-NOK is designed for optimal sealing in industrial applications. Constructed from high-performance SIMRIZ material, it offers excellent resistance to a variety of chemicals and temperature extremes. With an inner diameter of 18" and an outer diameter of 18.5", this O-ring meets AS568 specifications, ensuring compatibility with numerous systems. The 1/4" thickness enhances its sealing capabilities, making it ideal for hydraulic and pneumatic uses. This product complies with industry standards, ensuring reliability and longevity in challenging environments.