I am selling an item I purchased this year but never used to someone who will. It has been opened for photography, but it is a new, unused item. Retail price was around 3000 yen. [High Quality and High Performance]: This 20kg servo features strong brass gears, a high-precision potentiometer, a CNC aluminum mid-frame, a stable chip, and waterproof rubber sealed screws. It has low noise, good heat dissipation, low friction, fast response, excellent anti-interference, and a long lifespan. [Wide Application]: The 20kg digital RC servo can be widely used in robots, robotic arms, mountain bikes, remote control toys, etc. It is also fully compatible with 1/8 and 1/10 scale BAJA RC cars, buggies, and truggies. [PWM Control]: Controlled by a pulse width modulation system. Precise control is possible, with an angle range of 0-270 degrees with a pulse range of 500μs to 2500μs. It can rotate 360 degrees when the power is off. The rotation angle is 135 degrees when using a remote controller (1000-2000μs). High-precision metal gears (hard anodized) CNC aluminum mid-frame Waterproof rubber sealed screws Dual shaft RC servo Specifications: Model: RDS3218MG Stall torque (5V): 21.5 kg·cm Stall torque (6.8V): 25 kg·cm Dead band: 3 μs Control angle: 270 degrees (500-2500μs) / 135 degrees (remote control 1000-2000μs) Pulse width: 500～2500 μs Speed: 0.20 sec/60° (5V) / 0.17 sec/60° (6.8V) Operating voltage: 4.8～6.8 V DC Weight: 60 g Motor type: DC motor Gear type: Copper & Brass Operating frequency: 50～330 Hz CE certification: Yes Wire length: 32 cm Size: 40×20×40mm (servo body), 64×55.6×20mm (when assembled with metal bracket) Included: 1 x RDS3218 20KG Digital RC Servo 1 x Long U-shaped metal bracket 1 x Short U-shaped metal bracket 2 x Round metal discs 1 x Screw set