Profile: Linyi Hongsheng Foundry Co., Ltd. specializes in researching, developing, and manufacturing cast iron connections & couplings, and mechanical accessories. We are an ISO 9001: 2000 certified company. We can make precision foundry products from stainless steel, carbonic steel, alloy steel, and non-ferrous steel. Our products include auto parts, mechanical components, pump valve parts, and building hardware. The minimum casting space is 0.75 m, the thinnest casting we do is about 0.15 mm, and the longest blind hole (diameter 30mm) is 170 mm. We offer stainless steel casting and investment casting. Our valve stem is provided with mirror polish finish.