Ideal for hobbyist, experimenters, robotics, replacement, etc. Torque: Medium Operating Volts: 1.5- 4.5V Nominal Volts: 4.5V Speed (no load): 12500rpm Current (no load): 0.25A Speed (max eff): 9560rpm Current (max eff): 0.81A Torque (max eff): 17.86gcm Size dia: 23.6mm Size length: 25mm Shaft length: 6.5mm Shaft dia: 2mm.