... engrave cylinder objects such as cup,brush pen, brush pot etc. Parameters ModelBig Rotary DeviceSmall Rotary DeviceMin diameter10mm10mmInside diameter10~90mm10~70mmOutside ... break through the engraving limit of 2-dimenision3. Big rotary device is used for model YH-G8050, YH-G9060, ... G1290, YH-G1490, YH-G1612, YH-G1616.4. Small rotary device is used for YH-G5030Applicable materials:Wood, paper, leather ...