Features: Long service life time due to low friction, low operation noise. No stick-slip effect, heats up less, reduced drive power required. Low frictional loss, high transmission efficiency. There are a lot of balls rolling movement between the screw shaft and ballscrew nut, they are able to get a higher efficiency of movement. Helpful in saving. Ballscrew used the ball movement, so the starting torsion is very small, doesn't appear a sliding motion creeping phenomenon, can ensure accurate positioning. Specifications: Total Length: 300mm / 11.81inch Screw diameter: 16mm / 0.63inch Screw pitch: 5mm / 0.2inch Max Speed : 16000RPM Weight: Approx. 548g Package Included: 1 x Rolled Ballscrew (300mm) Note: Please allow 0-1cm error due to manual measurement. Thanks for your understanding. 1¡¢Long service life time due to low friction, low operation noise 2¡¢No stick-slip effect, heats up less, reduced drive power required 3¡¢Low frictional loss, high transmission efficiency 4¡¢There are a lot of balls rolling movement between the screw shaft and ballscrew nut, they are able to get a higher efficiency of movement. Helpful in saving 5¡¢Ballscrew used the ball movement, so the starting torsion is very small, doesn't appear a sliding motion creeping phenomenon, can ensure accurate positioning Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.