25mm, DC Gear Motor, Long Life, Low Noise, 9V Gear Motor Benefiting from large torque and reduced noise, 3mm diameter shaft,entire Metal gear motor. Broadly employed in Robots, RC Auto, lock, Auto shutter, USB admirer, Income detector, Coin refund units,Currency depend device, Towel dispensers, Automatic doors,Peritoneal machine,Automatic Tv rack, Workplace tools …