Aok Valve Stem Seals Ltd. is a manufacturer specializing in producing valve stem seals, boned seals (sealing washers), O-Rings, bushings, absorbers and precise customized rubber molded products. Maintaining excellent quality and customer satisfaction is our first priority. Established in 1995, we have been in the business for over 10 years. Our products have been successfully distributed to well-know industries, such as automobiles, motorcycles, chemical, forklift, and ...