This is the Futaba S9206 High-Torque Helicopter and Airplane Servo from Futaba.  This servo is for use in R/C airplanes and helicopters.  This servo is for use on 4.8 volts only.

INCLUDES:
One S9206 High-Torque Helicopter and Airplane Servo with a
Futaba J male connector
Four brass eyelets
Four black one-piece rectangular rubber grommets
Four 2 x 11mm servo mounting screws
One  small X-shaped servo horn
One  large round servo horn
One  6-arm servo horn

SPECS:
Speed:  .19 sec/60 deg @ 4.8V
Torque: 132 oz-in @ 4.8V
Length: 1.6"
Width:  0.8"
Height: 1.5" (without the servo horn)
Weight: 1.9 ounce (53 grams)
Connector: Male "J" type with approx. 5" wire