... surface Product No./NameJJ-00065 / Aluminum prototype with plating zinc alloy for mobile mold Manufacture Process1) Drawing/model/design ... to 1250T. 5) 27 product lines of post processing facilities with CNC machining, turning, milling, tapping, drilling, polishing, ... sandblasting etc...6) Tolerance: +/- 0.0005inch, also accord with GB6414 Aluminum prototype with plating zinc alloy for mobile mold