Feature:1. Applicable Model: The 40KG RC digital servo with 25T servo arm is compatible with remote control models such as 1/8, 1/10, 1/12 trucks, RC cars, robots, ships.2. Durable Materials: 40KG RC digital servo is equipped with sturdy copper and aluminum gears, CNC aluminum casing, and dual ball bearings, sturdy and reliable.3. Waterproof Design: The 40KG high torsion RC servo has excellent waterproof performance and can adapt to different harsh environments, ensuring long term use.4. High Rotation: The 40KG RC digital servo can control angles ranging from 0 to 270 degrees, with good linearity and precise control, enhancing perfect performance.5. Excellent Performance: RC digital servo provides high speed, responsive, unimaginable efficiency, and low power consumption, having excellent performance.Specification:Item Type: RC Digital ServoMaterial: Aluminum Alloy, PlasticServo Size: Approx. 40 x 20 x 41mm / 1.57 x 0.79 x 1.61inOperating Voltage: DC 4.8-8.4VOperating Speed (4.8V): 0.16sec/60degreeOperating Speed (7.4V): 0.14sec/60degreeStall Torsion (4.8V): 36kg/cmStall Torsion (7.4V): 40kg/cmApplication: Suitable for 1/12 1/10 1/8 RC Cars, Boats, Robots, etc..Package List:2 x RC Servo2 x Aluminum Alloy Servo Arm8 x Plastic Servo Arm8 x Screw Grommet8 x Shock Absorption Pad14 x Screw