... pollution, environmentally friendly;(7) Anti-counterfeiting function.Ring laser marking fiber laser beam Mini size with high speed etching engraver for ... 4. Applicable materialsGold, silver, copper, aluminum, stainless steel, hard alloy, chrome, titanium and other metals, ceramic, PVC, plastic, epoxy ... please kindly ley me know.24hours at your service. Ring laser marking fiber laser beam made in China