S3154 High Torque Digital Sub-Micro Servo from Futaba - FUTM0654
When you need a quality high torque sub-micro size servo that works well for 1400mm wingspan and smaller airplanes, small EDF jets, and 200 to 450 size helicopters the Futaba S3154 performs beautifully.
Features:

Ideal for smaller-sized electric aircraft
Increased precision (digital)
Light weight, perfect for Micro helicopters and aircraft
Nylon gears
One year warranty

Includes:

1x S3154 high torque digital sub-micro servo
1x .91" x .64" (23mm x 16mm) 4 arm servo horn (comes pre-installed)
1x 1.33" x 1.33" (34mm x 34mm) 4 arm servo horn
Instruction sheet