Specifications: Motor Type:3 Pole Bearing Type:Top Ball Bearing Speed (4.8V/6.0V):0.17 / 0.13 Torque oz./in. (4.8V/6.0V):50 / 60 Torque kg./cm. (4.8V/6.0V):3.6 / 4.3 Size in Inches:1.14 x 0.51 x 1.18 Size in Millimeters:28.96 x 12.95 x 29.97 Weight ounces:0.77 Weight grams:21.83