... precision casting Standard:JIS,DIN,ASTM,BS OEM service casting stainless steel valve ballWe are a foundry which is near the Qingdao harbor ... SAMPLES)1.ISO9001:2000 Approved 2.OEM service available 3.Materials: stainless steel,cast iron,pig iron,carbon steel,alloy steel,non-ferrous,grey iron ... treatment,polishing,machining,machining center,plating,HeatTreatment,ect. casting stainless steel valve ball