... mould ability 3.ISO9001:2008 4.Guarantee quality of the products Production details list Product nameBig venturi specifications ... 5mm Process technologyCasting, Machining, Metalworking, Sheet Metal Bending, Surface Treatment, Heat Treatment, Griding, Milling, wire EDM, ... can provide samples(one piece)before substantial orders.Surface treatmentBlacking, Polishing, Anodize, Chrome plating, Zinc plating ...