Features: This 12v lock linearly actuator with over current protect, short circuits protect, overloads protect, over voltages protect design. The electric linearly actuator is efficient power by 12v, wire up the positive and negatives poles in correct, apply voltages to the device and will extend, reverse the polarity and will retracts. Make from aluminum and plastic, strong enough and with fashion look. Come with end limit switches that will automatically top when the device arrive end of strokes, ensuring the motor will not burn out. Telescopic linearly electric actuator have small volumes, wide application, including medically, industrial, agricultural machinery, catering, ventilation facilities. Specifications: Component: Aluminum and Plastic Type: 30mm/50mm voltages: 12V Speed: 0.6inch/sec Thrust: 64N/14.4lbs Size: As Shown in the Picture Package Includes: 1pc Electric linearly Actuator note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.