... 3:Stable products 4;easy operation aser Marking Machine On Plastic Keyboards are detailed as follow:Feature:1: ... , precision instruments, eyeglasses and clocks, jewelry, auto parts, plastic buttons, construction material, PVC pipe, medical equipment, etc. ... chose)Optional marking range70mmX70mm/150mmX150mmEngraving depth ≤0.50mmComplete machine power 1.5KWMinimum line width0.015mmRepeat accuracy ± ...