1、Versatile: 20kg servo which has a stable performance is suitable for fixed wing, ducted airplane, model boat, toy car, IOT home, intelligent robot, etc. 2、Efficient and Low Power Consumption: The servo operates with high efficiency, low noise, and low power consumption. It is also easy to install and uninstall. 3、Robust Construction: Constructed with high class plastic and a semi aluminum casing, the servo undergoes fine processing to ensure durability and long lasting performance. 4、High Load Capacity: The metal gears are able to withstand higher loads, ensuring the RC waterproof servo kit operates smoothly even under heavy loads. 5、Highly Durable: Gear steering servo with 5 various servo arms is made with high class and hard alloy, equipped with metal gears, offering high accuracy. Item Type: RC Servo Shell Material: Aluminum alloy + plastic Size: Approx. 40.5x20.2x38mm/1.6x0.8x1.5in Working Voltage: DC 4.8V to 6V Maximum Torsion: ≥21.8kgf-cm at 6.0V Working Speed: ≤0.18sec/60° at 6.0V Applicable: Fixed wing/ducted airplane/model boat/toy car/IOT home/intelligent robot, etc. 1 x Servo 5 x Servo Arms 4 x Vibration Damping Pads 4 x Screw Cylinders 5 x Screws