... .Certificate: SGS ISO9001:2000 3.Material:Ductile iron Casting,Grey Iron Casting, Ductile Iron Casting & Gray Iron Casting, such as, Grooved Pipe & Fittings, Valve Body & Fittings, ... customers all over the world such , WATTAS, MUELLER,US PIPE,Kurdizel, etc. and we were awarded as the best supplier ... of our competitive price, delivery and quality. Sand Castings,Grey Iron Casting,Ductile iron Castings