Name :insulator fitting Material:cast iron Surface treatment:sand blasted Heat treatment: Anneal ... 2.OEM service available 3.Materials: stainless steel,cast iron,pig iron,carbon steel,alloy steel,non-ferrous ... ,grey iron,ductile cast iron and so on4.Process: lost wax process, ... ,polishing,machining,machining center,plating,HeatTreatment,ect Clamp Insulator fitting