Servo Hitec HS-81 Manufacturer Hitec Applications Heli/Airplanes Type Analog Micro Torque 4.8V 36 oz/in (2.6 kg/cm) Torque 6.0V 42 oz/in (3 kg/cm) Speed 4.8V 0.11 sec/60 degrees Speed 6.0V 0.09 sec/60 degrees Dimensions 30mm x 30mm x 12mm Weight 16.6g Bearings - Gear Type Nylon