... precision engineered parts competitive price gold plating cnc machining brass parts in Dongguan 1. Fully Machining Services: ... service. 2.Various Machining Materials:stainless steel, alloy steel ,brass, bronze, copper, aluminum, plastic, or customer specified. 3 ... step; 100% inspection before shipment by micrometer, height gauge, projector measuring machine, coordinate measuring machine(CMM), ect. ...