Specifications: Motor Type:3 Pole Bearing Type:Top Ball Bearing Speed (4.8V/6.0V):0.14 / 0.11 Torque oz./in. (4.8V/6.0V):25 / 31 Torque kg./cm. (4.8V/6.0V):1.8 / 2.2 Size in Inches:0.92 x 0.45 x 0.94 Size in Millimeters:23.37 x 11.43 x 23.88 Weight ounces:0.42 Weight grams:11.91