This is the Hitec HSB-9380TH Ultra Torque Brushless Servo.
FEATURES
Ideal for large planes, 1/8 and 1/5 scale on and off-road vehicles
Titanium gear train with dual ball bearings
Ultra hard gear shaft with three axial metal bushings
Hybrid MPD first gear
Low current consumption
Programmable 12-Bit resolution digital circuit
25 tooth standard spline
Water and dust resistant
INCLUDES
HSB-9380TH High-Speed Brushless Servo, with 3x8mm Horn Screw
0.94"(24mm) Single Arm
1.3" (33mm) Single Arm
2.1" (54.5mm) Single Arm
1.7" (44mm) Double Arm
2.8" (72mm) Double Arm
4.3" (110mm) Double Arm
1.4" (36mm) diameter Round Arm
1.5" (38mm) diameter Four Point Horn
Four each Grommets, Eyelets and Screws
SPECIFICATIONS
6.0V 7.4V
Speed: 0.17 0.14
Torque: 472 oz-in (34.0 kg-cm) 472 oz-in (34.0 kg-cm)
Dimensions: 1.57 x 0.79 x 1.50" (40.0 x 20.0 x 38mm)
Weight: 2.40oz (68g)