This is the Savox SV-0220MG High Voltage Digital Servo.

Features:

    High voltage capable on a budget
    DC Motor
    Totally Green – from materials to production, these servos are environmentally friendly.
    Ideal in planes, 1/8 scale, and 1/10 scale cars and trucks.
    Suitable for use in boats and helis

Dimensions(mm): 40.7X20.2X37.0
Weight(g): 59.0
Speed(@6.0V sec/60): .16
Torque(@6.0V oz-in): 90.3
Speed(@7.4V sec/60): .13
Torque(@7.V oz-in): 111.1
Gear: Metal
Bearing: 1BB
Case: Plastic