1、Retrofit Tool: Retrofit and upgrade digital servo with nice performance, suitable for remote control of cars and robots. You can use it to enhance the performance. 2、Excellent Performance: Our products have accuracy gears, more wearproof, not easy to collapse and sweep teeth. Improve the daily use experience. 3、Kit Includes: Includes servo accessory kit, spare gear and shaft pin, 25t metal servo arm. Can help you better modify your remote control car. 4、Ideal Choice: This is a ideal choice for university professors and students interested in developing software for robot parts. Tailored for RC enthusiasts, offering different experiences and fun. 5、Waterproof Design: Maintain nice water tightness under wet conditions, avoid making the machine difficult to run because of water, and reduce the use of trouble for you. Item Type: Brushless Digital Servos Weight: 156g/5.5oz Shell Material: aluminum alloy Color: Black Steering Gear Size: 55 x 20 x 48mm/2.2 x 0.8 x 1.9in Neutral Position: 1500μs/330hz Dead Zone: 2μs 6V Working Speed: 0.12 seconds /60 degree 6V Locked Rotor Torque: 60kg/132.3lb 7.4V Working Speed: 0.1sec /60 degree 7.4V Locked Rotor Torque: 70kg/154.3lb Applicable: 1/10 1/8 RC model car 1 x Digital Servo 1 x Aluminum Steering Gear Arm 2 x Gear 2 x Latch 2 x Plastic Steering Gear Arm 6 x Screw 4 x Screw Cylinder 4 x Shock Absorbing Pad