This is the Savox SH-1290MG Digital Metal Gear Ultra Speed Servo.
Features:
- Super High Resolution
- Water-Resistant w/4 silicone seals
- Coreless Motor provides high speed, incredible efficiency, and low power consumption
- The 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 500, 600, and 700 class helis