... 3:Marking depth:0.1-1.0mm Metal Material Fiber Laser Engraving Machine are detailed as follow ... eyeglasses and clocks, jewelry, auto parts, plastic buttons, construction material, PVC pipe, medical equipment, etc. .3; application ... special surface treatment (phosphate, aluminum anodizing, plating surface), ABS material (electrical appliances, housing, commodities), ink (translucent button, print ...