... ,brush pen, brush pot etc. Parameters ModelBig Rotary DeviceSmall Rotary DeviceMin diameter10mm10mmInside diameter10~90mm10~70mmOutside diameter200mm130mmMax length of materials450mm270mmFeatures1 ... through the engraving limit of 2-dimenision3. Big rotary device is used for model YH-G8050, YH- ... YH-G1490, YH-G1612, YH-G1616.4. Small rotary device is used for YH-G5030Applicable materials:Wood, paper, ...