... , iron , white brass , aluminium, Steel ,Zinc etc .Machining methodlathe turning, cnc turning, milling, threading, etcSurface finishPolishing , chrome, nickel plating, zinc plating ... No. Quantity Number of Year(s) Used Condition Spring Press Machine CNC502 7 3.5 Acceptable Automatic Spring Machine RLM 14 3.5 Acceptable Button ...