Updated Digital Servo, Quimat 20KG Full Metal Gear 180 Degree Control Angle Waterproof Servo for Robots Helicopter Airplane Car Truck Boat Controls Accessories Double bearings and full metal gear, 20kg Digital High Torque Brushless motor servo Vehicles & Remote Control Toys,widely used, suitable for Robots Helicopter Airplane Car Truck Boat controls High performance digital standard servo High-precision metal gears with hard anodizing with convenient wiring mode, adopt plugging and drawing wire mode of connection, avoid unsoldering. With accesories such as plastic tooth spline, screws, as shown in the picture.