... sand blasting,polishing,zinc plated Moq:500pcs precision casting part ARTprecision casting part MATERIALcarbon steel,stainless steel,,aluminum,etc.SURFACEsand blasting ... treatment: sand blasting,polishing,zinc plated,chromeplate,blackening etcEquipments:CNC engine lathe, milling machine, drilling machine,hobbing machine, grinder ... sample to you for close inspection. Aluminum precision casting part