... 3) CE standard 4) 40w laser tube Small laser engraving machine Technical parameter: modelWDJ-6040Working area600 x 400mmLaser TypesHermetic ... Available materials: acrylic, PVC, rubber sheet, plastic, crystal, glass, wood, bamboo, oxhorn, figuline,marble, leather, cloth, double-color board, ... electron, building upholster, timekeeper and jewelery industry and so on. Sample: Small laser engraving machine