high quality cnc machining parts aluminum 1. Best surface treatment 2. Good performance 3. ... and testing equipment CNC Drilling and tapping machines Materials Iron, aluminum, steel, coppe, plastic, carbon steel, nylon, bronze,soldder alloy ... drawings. Surface Treatment Heat treatment, plating(zinc, nickel, chrome, aluminum alloy), anodized with various colors, PVD/PCD coating, polishing, ultrasonic ...