Heavy Duty CNC Router Linear Motion Guideway + Ballscrew Combined 12 inch Travel Stroke Double Axis Linear Motion CNC Router/Robot Module Dual Shaft Design 2010 Ball Screw Stroke: 12 inches Ball Screw Lead= 10mm Can work with the following Motors: 57/86 Stepper Motors 100W, 200W and 400W Servo Motors Linear Motion Guideways: SBR20 Accuracy: C7 Pack#VXB-S140K-310mm-10mm Maximum Speed: 500mm/second Pack#VXB-S140K-310mm-10mm patch#09/08/2020.