Profile: Shengjian Prosperity Machinery Parts Co., Ltd. is a parts casting company. Our services include design, manufacture, retail and after sales service. Our products include grey iron casting custom, and counter weight. Heavy industry counterweight iron is generally classified according to the molding method, and it is conventionally divided into ordinary sand counterweight iron and extra heavy iron. The common sand-type counterweight iron includes three types include wet sand type, dry sand type, and chemically hardened sand type. Special counterweight iron can be divided into two categories according to different molding materials such as one uses natural mineral sandstone as the main molding material, such as investment weight iron, shell weight iron, negative pressure weight iron, and mud type counterweight iron.