... facula is smaller than 0.12mm. The engraving pattern has distinct layers and without rough brim.4 ... attachment, Auto focus system, Constant temperature water chillerApplicationApplicable Materials: Wood, Acrylic,Polyester Plywood, MDF, Glass, Plastic, Acryl, ... Marble, Bamboo, Balsa, Rubber Sheet, etc.Applicable Industries: Wood furniture,Wood Craft,Advertising, Signs, Gifts & Crafts, Promotional Items, ...