The AS568-464 17 1/2" ID x 18" OD x 1/4" SIMRIZ SZ495 O-ring by Freudenberg-NOK is engineered for superior sealing performance in demanding environments. Constructed from high-quality SIMRIZ material, this O-ring offers exceptional resistance to chemicals and temperature fluctuations. With precise dimensions of 17.5 inches inner diameter and 18 inches outer diameter, it adheres to AS568 standards, ensuring a perfect fit for various applications. The 1/4" thickness enhances its sealing capabilities, making it suitable for hydraulic and pneumatic systems, while its compliance with industry standards guarantees reliability and durability.