Name :insulator fitting Material:cast iron Surface treatment:sand blasted Heat treatment: Anneal. insulator fittingmaterialsurface steelzinc ... 3.Materials: stainless steel,cast iron,pig iron,carbon steel,alloy steel,non-ferrous,grey iron,ductile cast iron and so on4.Process: lost ... service10.surface treatment,polishing,machining,machining center,plating,HeatTreatment,ect Clamp Insulator fitting