Power HD LF-20MG 4.8-6.6V SUPER TORQUE Digital Metal Gear Servo 0.16sec/277.7oz-in/20kg-cm Excellent Digital Metal Gear Servo for 1/10 & 1/8 cars, 30CC or 50CC planes Full Metal Gears, Mid Aluminum Casing for Extra Cooling Operating Voltage4.8 ~ 6.6 DC Volts Torque(4.8V): 16.5 kg-cm (229.1 oz/in) | Torque(6.6V): 20.0 kg-cm (277.7 oz/in) Speed: 0.18 sec (4.8V)  0.16 sec (6.6V)