The AS568-466 18 1/2" ID x 19" OD x 1/4" SIMRIZ SZ485 O-ring by Freudenberg-NOK is engineered for high-performance sealing in industrial environments. Made from premium SIMRIZ material, this O-ring offers exceptional resistance to chemicals and temperature extremes. With an inner diameter of 18.5 inches and an outer diameter of 19 inches, it meets AS568 specifications for compatibility with standard fittings. The 1/4" thickness ensures a reliable seal, making it ideal for hydraulic and pneumatic applications, while its adherence to industry standards guarantees long-lasting performance.