This is the S9256 Digital Servo used with the Futaba GY611 Gyro

SPECS:   

Dimensions: 1.57"x 0.79"x 1.44" (40 x 20 x 36.5mm)
Weight: 2.01oz (57g)
Speed: 0.06sec/60 deg at 4.8V
Torque: 47 oz-in (3.4 kg-cm) at 4.8V

FEATURES: Aluminum case with heat sink to help cool motor

INCLUDES:

Four rubber grommets to isolate vibration
Four brass eyelets
Four phillips head self-tapping mounting screws
One large servo wheel 35mm in diameter
One star shaped (6 arms) servo arm 32mm accross
One X shaped servo arm 39mm across

Accessories: Gear Set, FUTM3443;  Case Set, FUTM3064