This is a replacement motor for certain types of Hansen movements. Has a 10-tooth pinion gear on the front that is approx. 7/32″ wide (5.6mm). Runs at 1rpm, 60hz, 110 volts, 3 watts. These are for the TYPE C movement and #610, 143R, A43RA, A44RA and 288-003. Once plugged in the little gear on the front always rotates to the right or clockwise. Mounting screws not included.