1.Material: ductile/nodular iron 2.Process: clay,resin sand, lost-foam 3.Surface treatment: sand blasting, painting 1.Material: ductile/nodular iron2.Process: clay,resin sand, lost-foam3.Surface treatment: sand blasting, painting4.Inspection :chemical experiment, physical experiment, metallographic test structure5.We can also manufacture your products according to your drawings or samles.