HIGH QUALITY SERVO: FT5320M servo motor is composed of a sturdy PA aluminum middle shell, a strong copper metal gear, and a hard iron shaft, provide higher stability and provide longer service life. GREAT COMPATIBLE MOTOR: The servo motor system is controlled by pulse, compatible with 1/8 and 1/10 scale RC robots, trucks, off-road vehicles, robotic arms, and any application that uses a standard servo system. SERVO PROTECTION MECHANISM: The steering gear has IP54 waterproof performance and ball bearings.The output torque exceeds the overload torque, lasts 8S, or the temperature over 70 ℃, the steering gear will automatically stop the output torque. The overload torque can be modified. HIGH ROTATION SPEED SERVO: A high-torque servo, the rotation angle is 180 degrees (at 500→2500μsec), when the power is stopped, it can rotate 360 degrees. Dead width ≤ 4 μsec. Durable and reliable. STRONG STALL TORGUE MOTOR: The operating voltage range is 4V-8.4V, the stall torgue is (6V) 229.54oz/in(16.5kg/cm), (7.4V) 278.23oz/in(20kg/cm), the servo size is 55X20X43mm. 20KG RC Servo High Torque Servo Motors 2pack