Features: Application: Compatible with most of engraving machine in the market such as ATOMSTACK, SCULPFUN,NEJE,XTOOL,ORTUR. This machine can work directly with the engraver on materials with a cylindrical shape. According to the cable attachment, the machine can work with mainly engrave on material with a cylindrical shape. Engraving Size: Cylinder diameter 18-120mm, length 20-225mm, material length/material diameter>1.0. The Rollers can be set at 5 different distances, each one 15mm further than the last. The adjustable range is 30-90mm. Motor: NEMA17 34mm Stepper Motor; Phase Current: 1.33A; Pulse Parameter Setting: 80PULSE; Maximum Load Weight: 5 KG. Any problem, please contact our store without hesitation. Honor to serve you. Specification: Material: Aluminum Motor: NEMA17 Stepper Motor Pulse Parameter setting: 80 PULSE/mm Phase Current: 12V 1.3A Product Dimensions: 259x125x78mm/10x4.9x3in Packing Size: 305x160x115mm/12x16.2x4.5in Packing Weight: 1.13kg/2.49lbs Packing List: 1 x Laser Rotary Roller