Gray iron Class 30, weight 4-10lbs, gear casting. 1)ISO9001:2000 Approved 2)OEMsrvice available 3)Materials: gray iron and ductile cast iron 4)Process :Lost Max process. Sand casting 5)Weight range :0.1-500KG 6)Application :Industrial parts .Machinery Parts .Hardware . Construction parts .Valve/Valve parts . train . Carft . Agricaulture machinery 7)Samll orders accepted 8)Make machining service as your requirement or drawing