This is the Hitec HS-8380 HV High Response, Ultra Torque Servo.
FEATURES: Ideal for 20-120 class aircraft, all EP 600-700, and GP .30-.90
class helicopters, 1/10-1/4 scale vehicle steering and throttle
servos, and nitro & gasoline powered boats
Titanium alloy metal gears with dual ball bearings
Ultra hard gear shaft with three axial metal bushings
Enhanced heat sink for better cooling
Enhanced water and dust resistance
Non programmable
INCLUDES: Hitec HS-8380 HV Servo with 3mm Horn Screw, Hex Socket Screw, 0.94"
(24mm) Single Arm Horn, 1.7" (44mm) Double Arm Horn, 1.5" (37.8mm)
4-Point Horn, 1.4" (36mm) Round Horn, four each Eyelets, Grommets,
and Mounting Screws
SPECS: 6V 7.4V
Speed: 0.15sec @ 60° 0.13sec @ 60°
Torque: 402.73oz-in (29kg-cm) 486.05oz-in (35kg-cm)
Weight: 2.4oz (68g)
Dimensions: 1.57 x 0.79 x 1.50" (40 x 20 x 38mm)