This O-RING is made from durable BUNA 70 material, ensuring long-lasting use. Its dimensions are specified as inner diameter (I.D.), outer diameter (O.D.), and thickness, providing accurate measurements for compatibility with your specific equipment. This product falls under the category of Other Hydraulics & Pneumatics, Hydraulics, Pneumatics, Pumps & Plumbing, and Business & Industrial, making it a versatile option for a range of industries. 568=018 (QUANTITY OF 5)