Dongying Tousin is a professional steel casting manufacturer with its own foundry, CNC machining department and handcraft polishing factory. As a major manufacturer of investment castings, we adopt the lost-wax process to serve a huge variety of markets that require metal parts in stainless steel, carbon steel and different kinds of alloy steel. Our tenet is “Quality is our base and the client is our supportâ€. The soul of Tousin is “Faithful, Quality, Development, Advancementâ€.