Features: 1[PREMIUM QUALITY MATERIAL] This 20kg digital RC servo's waterproof rubber sealing screw, made of first class material, has stable performance and ensures a long service life of the product. 2[High Performance] Digital servo is equipped with high accuracy potentiometers and high resolution digital chips, with quick response speed, strong anti interference ability, low noise, and fast heat dissipation. 3[Unique Treatment] The 20kg servo features hard anodized metal gears for greater accuracy and longer life. The CNC aluminum middle shell enhances heat dissipation to ensure the normal operation of the servo motor. 4[Rotatable Design] RC 20kg servo can be rotated 270 degrees, with good linearity and high control accuracy. It can rotate 360 degrees when the power is off, which is very suitable for robot joint activities. 5[Scope of Application] The 20kg waterproof digital steering gear can be widely used in robots, robotic arms, climbing cars, remote control boats, remote control planes, etc. Package included: 2 x Servo 2 x Metal Servo Arm 8 x Plastic Servo Arm 8 x Screw Barrel 8 x Rubber Pad 14 x Screw