Professional used on the laser machine, to engrave cylinder objects such as cup,brush pen, brush ... YH-G5030Applicable materials:Wood, paper, leather, cloth, Plexiglas, epoxy resin, density board, double-colored board, marble, plastic, rubber, ceramic tile, crystal ... the problem. 3. User-friendly English manual and CD for machine using and maintaining.4. Free lifetime upgrading of self-developed ...