The AS568-464 17 1/2" ID x 18" OD x 1/4" SIMRIZ SZ498 O-ring from Freudenberg-NOK is a high-quality sealing solution designed for industrial applications. Made from durable SIMRIZ material, this O-ring provides excellent resistance to a wide range of chemicals and high temperatures. With an inner diameter of 17.5 inches and an outer diameter of 18 inches, it adheres to AS568 specifications, ensuring a perfect fit for various systems. The 1/4 inch thickness guarantees a secure seal, making it suitable for hydraulic and pneumatic systems. This product meets industry standards for quality and performance.