Servo Hitec HS-645MG Manufacturer Hitec Applications Heli/Airplanes Type Analog High Torque Torque 4.8V 107 oz/in (7.7 kg/cm) Torque 6.0V 133 oz/in (9.6 kg/cm) Speed 4.8V 0.24 sec/60 degrees Speed 6.0V 0.20 sec/60 degrees Dimensions 41mm x 38mm x 20mm Weight 55g Bearings Ball Bearing Gear Type Metal