Hitec 32645S HS-645MG High Torque 2BB Metal Gear Servo Motor Type: 3 Pole Bearing Type: Dual Ball Bearing Speed (4.8V/6.0V): 0.24 / 0.20 Torque oz./in. (4.8V/6.0V): 107 / 133, Torque kg./cm. (4.8V/6.0V): 8.0 / 10.0 Size in Inches: 1.59 x 0.77 x 1.48, Size in Millimeters: 40.39 x 19.56 x 37.59, Weight ounces: 1.94, Weight grams: 55