The AS568-464 17 1/2" ID x 18" OD x 1/4" SIMRIZ Z7257 O-ring from Freudenberg-NOK is designed for optimal sealing performance in industrial applications. Made from durable SIMRIZ material, this O-ring provides excellent resistance to a variety of chemicals and high temperatures. With an inner diameter of 17.5 inches and an outer diameter of 18 inches, it meets AS568 specifications, ensuring a perfect fit for various systems. The 1/4 inch thickness ensures a reliable seal, making it suitable for hydraulic and pneumatic applications. This product adheres to industry standards for quality and performance.