Taian Yuexin Industry & Trade Company, which has own steel ball factory (AST), locates in Taian city, Shandong, China, manufactures steel ball with variety of materials, such as high carbon, low carbon steel, chrome, stainless steel etc. Size from 0.5 mm to 25 mm. Grade from G200 to G1000. The standard of hardness and wide application can meet customers from both home and abroad.