S-U400 High Torque Digital Standard Servo from Futaba - FUT01102333-3
When you need a quality high torque standard size servo that works well for 2000mm wingspan and larger airplanes, turbine powered jets, and 700 to 800 helicopters the Futaba S-U400 is an excellent choice.
Features:

Comes with heavy duty wiring that can handle higher current loads
Ball bearing output shaft
Nylon gears
High torque
One year limited warranty

Includes:

1x  S-U400 high torque digital standard servo
4x Rectangular grommets
4x Chrome bushings
4x Mounting screws
1x Large round horn
1x Six arm horn
1x Four arm horn
Instruction sheet