The POLOLU-1576 is a 200:1 micro metal gearmotor from Pololu, a manufacturer of small robotic components. It has a 6V operating voltage and can deliver up to 120 mA of continuous current. It has a motor diameter of 1.41”, a motor length of 1.18”, and a total weight of 0.44 oz. The gear ratio is fixed at 200:1, meaning the motor shaft rotates 200 times in order to rotate the gearbox output shaft once. The gearbox itself is composed of three spur gears, has a diameter of 0.79”, and a length of 0.628”. It comes with an integrated quadrature encoder in the motor shaft, which lets the motor’s current position be easily tracked. This type of gearmotor is used in robotic projects due to its compact size, light weight, and low power consumption.