... machine HR-6040 Applicable materials: Acrylic, crystal, glass, ceramic, marble, granite, metal coating, cloth, fabric, wood etc. cotton ... Red light pointer, AutofocusApplicable materialAcrylic, crystal, glass, ceramic, marble, metal coating, cloth, fabric, wood etc. Main parts ... compressor water chiller focus len and reflector laser tube up-down worktable 6040 marble stone laser engraving machine