... quality control4. OEM service5. Welcome customized designsMaterial:Grey iron, ductile iron, malleable iron, stainless steel, carbon steel, aluminium, ... 90KG Tolerance :CT7 Grade Details: Material Grey iron,ductile iron,malleable iron,stainless steel, carbon steel,aluminium, ... customers requirementsProcess:Huangshan Amethyst Casting Industry Co.; Ltd Ductile iron QT600-7 sand casting cast iron auto parts ...