Hitec 37985S HS-7985MG V2 High Resolution High Torque Metal Gear Servo Motor Type: Coreless Bearing Type: Dual Ball Bearing Speed (4.8V/6.0V): 0.16 / 0.13 Torque oz./in. (4.8V/6.0V): 144 / 172, Torque kg./cm. (4.8V/6.0V): 10.4 / 12.4 Size in Inches: 1.57 x 0.78 x 1.45, Size in Millimeters: 39.88 x 19.81 x 36.83, Weight ounces: 2.18, Weight grams: 61.80