Since 2007, Ningbo Rock Metal Product Co., Ltd, an industrial trading company has been successfully established in Ningbo, China. We specialized in  developing, manufacturing and selling various kinds of products: carbon graphite, silicon carbide, tungsten carbide, compressor seal, Ceramic, other mechanical seal etc.    Rock started our production of advanced powder products and thereafter in-house R&D with continuous efforts in quality and production program improvement. Now, we have a highly competent team which consists of many professional and technical personnel on the aspects of sintering, casting, sealing, bearing, and mechanics as well as good sales power, and are equipped with advanced testing and productive instruments. We have become one of the advanced industrial technology professional companies with various products.    100% inspection, all products are checked to esure highest of standards.    If you have any questions,please do not hesitate to let us know.