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 1300 g- cm - Same size as the 7.2V YM- 2714 model above but with increased torque. Voltage: 12V NO LOAD Speed (RPM): 13000 Current (AMP): 0.6 AT STALL Torque (G.CM): 1200 Current (AMP): 17.2 AT MAX EFFICIENCY Efficiency(%): 55.1 Power (W): 26.5 Speed (RPM): 10489 Torque (G.CM): 246 Current (AMP): 4 AT MAX POWER Output (W): 31.1 Speed (RPM): 9304 Torque (G.CM): 326 Current (AMP): 5 DIMENSIONS Diameter: 35.8mm Total Length: 71mm Shaft Length: 9.5mm Shaft dia: 3.175mm Mounting thread dia: 3mm