This is the Futaba S9156 Digital Heavy Duty High Torque Servo.

FEATURES:
Ideal for any heavy duty loads such as control surfaces on 1/3 scale and larger airplanes and jets as well as boat rudders
Metal gear train eliminates backlash and slop
Aluminum center case helps to dissipate heat
One year warranty

INCLUDES:
Futaba S9156 Digital Heavy Duty High Torque Servo with Universal connector

REQUIRES:
Installing in model and connecting to receiver

SPECS:
Torque: 272 oz/in (19.6 kg/cm) @ 4.8V
340 oz/in (24.5 kg/cm) @ 6V
Speed: 0.21 sec/60¢X @ 4.8V
0.17 sec/60¢X @6.0V
Dimensions: 1.6 x 0.8 x 1.4" (40 x 20 x 37mm)
Weight: 2.2oz (63g)

COMMENTS:
For Case Set, order FUTM3059.
For Gear Set, order FUTM3456.
For Grommets order, FUTM2346
For Eyelets order, FUTM2347
For Mounting Screws, order FUTM2250