This motor a quality product with hardened drive shaft, sintered bearings and quality commutator brushes etc. They are ideal for any application where a compact high torque and reliable motor is required. Each motor is provided with a full data sheet which includes motor speed/torque/current/efficiency curves etc. - Torque 180 g-cm Voltage: 12V NO LOAD Speed (RPM): 14500 Current (AMP): 0.28 AT STALL Torque (G.CM): 372 Current (AMP): 5.21 AT MAX EFFICIENCY Efficiency(%): 66.1 Power (W): 5.56 Speed (RPM): 13544 Torque (G.CM): 40 Current (AMP): 1 AT MAX POWER Output (W): 13.57 Speed (RPM): 8266 Torque (G.CM): 160 Current (AMP): 2.4 DIMENSIONS Diameter: 27.66mm Total Length: 57mm Shaft Length: 13mm Shaft dia: 2.3mm Mounting thread dia: 2.6mm