... ,BS OEM service casting stainless steel valve ballWe are a foundry which is near the Qingdao harbor port and the airport. we can ... .OEM service available 3.Materials: stainless steel,cast iron,pig iron,carbon steel,alloy steel,non-ferrous,grey iron,ductile cast iron and so on 4.Process: lost ... treatment,polishing,machining,machining center,plating,HeatTreatment,ect. casting stainless steel valve ball