This is the Savox SG-0351 Standard Digital Servo.

Features:

    Strict production and quality control of plastic components
    Totally Green – from materials to production, these servos are environmentally friendly.
    Idea for throttle servo and park flier airplanes.

Dimensions(mm): 40.7X20.2X37.0
Weight(g): 41.0
Speed(@4.8V sec/60): .22
Torque(@4.8V oz-in): 44.4
Speed(@6.0V sec/60): .17
Torque(@6.0V oz-in): 56.9
Gear: Industrial Plastic
Bearing: 1BB 1MB
Case: Plastic
Running current (at no load): 100 mA @ 4.8V
Running current (at no load): 120 mA @ 6.0V
Stall current (at locked): 800 mA @ 4.8V
Stall current (at locked): 1000 mA @ 6.0V
Idle current (at stopped): 5 mA @ 4.8V
Idle current (at stopped): 5 mA @ 6.0V
Limit angle: 200°± 5°
Connector wire gauge: #26 AWG
Connector wire length: 300 ±5 mm
Horn gear spline: 25T
Control system: Pulse width modification
Amplifier type: Digital Controller
Operating Travel: 120° (when1000?2000 µsec)
Neutral position: 1500 µsec
Dead band width: 5 µsec
Rotating direction: Counterclockwise (when1000?2000 µsec)
Pulse width range: 700?2300 µsec
Maximum travel: Approx 185°(when700?2300 µsec)