Features: Brand new and high quality No installation, no adjustment, ready to use after unpacking. Roller protruding design, no obstruction, unlimited length of engraved objects. Applicable to 95% of engraving machines on the market. Concentric design, adjustment-free timing belt,and the motor is not exposed, safer. Engraving: longer cylinders, small diameter cylinders, over-length plate engraving, over-length plate cutting. Specifications: Name: Nema 17 stepper motor Model: 17HS4401 Step Angle:1,80.09 Rated voltage: DC 3.6V Rated Current: DC 1.5 A/Phase Holding Torque: 420mN.M Maximum no load Starling frequency:21900PPS Weight: 255g Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x CNC Laser Engraving Machine