This is the Futaba S9156 Digital Heavy Duty High Torque Servo. 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 Futaba S9156 Digital Heavy Duty High Torque Servo with Universal connector Installing in model and connecting to receiver Torque: 272 oz/in (19.6 kg/cm) @ 4.8V 340 oz/in (24.5 kg/cm) @ 6V Speed .21 sec/60° @ 4.8V .17 sec/60° @6.0V 1.6 x 0.8 x 1.4" (40 x 20 x 37mm) Weight: 2.2oz (63g) For Case Set, order FUTM3059. For Gear Set, order FUTM3456. For Grommets order, FUTM2346 For Eyelets order, FUTM2347 For Mounting Screws, order FUTM2250 jxs 4/19/07 ir/jxs &