YN-1218 stone cnc engraving machine 1 Taiwan linear rails,Germany ball screw 2 strong structure--stable 3 cost- ... engraving with cost-effective priceFeatures:a. Adopt Taiwan square linear rails and Germany ballscrew, with our professional design, could guarantee the ... 12.73.175, 6, 12.73.175, 6, 12.7XYZ Guide RailsLinear Square RailLinear Square RailLinear Square RailTransmissionRack Gear of X ...