Servo Hitec HSG-5083MG Manufacturer Hitec Applications Heli Tail Servo Type Digital High Speed Micro Torque 4.8V 20.85 oz/in (1.5 kg/cm) Torque 6.0V - Speed 4.8V 0.07 sec/60 degrees Speed 6.0V - Dimensions 30mm x 29mm x 13mm Weight 21g Bearings - Gear Type Metal