This is the Hitec HS-8335SH High Voltage, High Response Mighty Torque Digital Servo.
FEATURES: Durable steel gears with dual ball bearings Ultra hardness gear shaft with three axial metal bushings Water and dust resistant Non-programmable Motor heat sink
INCLUDES: HS-8335SH Servo with 1.7" (44mm) Double Arm Horn, 1.4" (36mm) Round Horn, 0.98" (25mm) Single Arm Horn, 1.4" (36mm) 4-Point Horn, and four each Eyelets, Grommets, and Mounting Screws
SPECS: 6.0V 7.4V Operating Speed: 0.16sec/60° 0.13sec/60° Output Torque: 256.90oz-in (18.5kg-cm) 333.28oz-in (24.0kg-cm) Weight: 2.25oz (64.0g) Dimensions: 1.57 x 0.79 x 1.45" (40.0 x 20.0 x 37.0mm) Horn Screw Diameter: 3mm Number of Teeth on Spline: 25
BOX DIMENSIONS: 2.88" W. X 1.38" H. X 3.63" L. BOX WEIGHT: .25 LBS.