The Freudenberg-NOK SIMRIZ Z7257 O-Ring meets AS568-321 specifications, featuring a 1-3/16" inner diameter and a 1-9/16" outer diameter with a 3/16" cross-section. Made from high-quality SIMRIZ material, this O-Ring offers exceptional resistance to a wide range of chemicals and high temperatures, making it ideal for demanding industrial applications. Its robust design ensures a reliable seal, reducing the risk of leaks and enhancing system performance. The Z7257 is perfect for engineers looking for durable sealing solutions.