Reefs RC 99micro High Torque/Speed Metal Gear Digital Micro Servo. 

Specifications:
Waterproof: Yes
Input Voltage: 6v-8.4v
Internal: Precision Metal Gears / All CNC Alum. Casing
Bearing Type: 2BB
Weight: .70oz
Dimension: .90 x .47 x 1.08 (LWH)
Torque: 89oz @ 6.0v / 99oz @ 7.4v / 115oz @ 8.4v
Speed: .11sec @ 6.0v / .09sec @ 7.4v / .08sec @ 8.4v
Spline: 25T MICRO   
Dead Band Width: 2¦Ìs
BEC: Not Required