We are Jinan Hongyang Petroleum Machinery Co., Ltd., PR China, specialized in manufacture & supply of replacement parts of drilling machine for more than 12 years. Especially the fluid end expandable parts of wide variety of mud pump, such as Modules, Hy-chrome Liner and Piston, Valve and Seat. We have our own factories & warehouse and the quality of our products are as good as OEM for direct replacement & even better and strictly follow the standard of API-7K, which have been successfully proven under the drilling conditions of extreme pressure, high temperature and corrosive environment. Please just take a second to look for more detailed information. Awaiting for your kindly and sooner reply, even one word by the following : ***** & allan.hongyangyahOO<>com Thanks and best regards. Allan Zhang