These motors were left over from the manufacture of the RB5X robot from RB Robot Corp and later General Robotics. They are new and sealed in the original packaging. (will be repacked for shipping) They were built by Mabuchi Motor in China. You will receive 6 motors on completion of the auction. Specifications: DC motor nominal input voltage is 6v Bench voltage 6v tested, no load current is <.4 amps and the test speed is 20000 rpm Estimated to be used with 4.2v-7.2v for power tools, robots, hobbies, etc... Motor diameter 35.5mm Motor body length 50.1mm Output shaft length 8mm Output shaft diameter 3.15mm smooth round Screw hole diameter m3 Screw hole distance 25mm Weight 150g Voltage dc 6v no load current .4a Stall current 4a +/- speed 20000 +/-