The Savox SH-1357 is a micro sized, digital servo that is extremely fast for its size without having to use higher voltage batteries which makes it great for a number of applications.Features:Light weightCoreless Motor provides high speed, incredible efficiency, and low power consumptionThe Aluminum Case design not only looks good but also allows for lower operating temperatures.Totally Green - from materials to production, these servos are environmentally friendly.Ideal as a rudder servo on 450 class helis, and as a CCPM servo on 500 class helis.Specifications:Speed @ 6.0V: 0.07 sec/60degTorque @ 6.0V: 34.7 oz-in / 2.5 kg-cmWeight: 26gBearing: DualType: MiniGear: Industrial PlasticCase: AluminumOutput Shaft: 25T SplineCase Size (LxWxH): 35x15x29.2mm