1、Long output shaft, suitable for various low speed motor model such as precision robot, model aircraft 2、Torque is big, all metal gears are durable and not easy to damage 3、Small size, large torque and small current, with larger reduction ratio, the motor running more quiet 4、Output shaft is a thread screw, can easily make a mobile transmission structure with a nut 5、Can be used on electronic door locks, automatic door locks, intelligent robots, model vehicles, etc Description: Long shaft gear motor is a high quality gear motor. The gear motor adopts full metal structure including mental gear reducer with precise micro gear. This gear motor has large torque and small noise, can be used on electronic locks, intelligent model cars, robots, etc. Features: Long output shaft, suitable for various low speed motor model such as precision robot, model aircraft. Torque is big, all metal gears are durable and not easy to damage. Small size, large torque and small current, with larger reduction ratio, the motor running more quiet. Output shaft is a thread screw, can easily make a mobile transmission structure with a nut. Can be used on electronic door locks, automatic door locks, intelligent robots, model vehicles, etc. Specifications: Motor Length: 16mm / 0.63" Gear Box Length: 9mm / 0.35" Cross Section Dimension: 12mm x 10mm / 0.47 x 0.39" Output Shaft Length: 55mm / 2.16" Output Shaft Diameter: M4 Rated Current: 0.17A Rated Torque: 0.5 KG.CM Original Speed: 20000RPM Output Speed: 400RPM Error: ± 10% Weight: 18g(approx.) Package Includes: 1 x Gear Motor Note: 1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.