This is the HS-82MG Metal Gear Micro Servo from Hitec.
FEATURES: For small planes, gliders, electric helicopters and 1/18 scale cars
INCLUDES: HS-82MG Metal Gear Micro Servo with universal connector, 0.67" (17mm)
diameter horn, 1.1" (29mm) double arm, 0.90" (23mm) 4-point horn
and mounting hardware
REQUIRES: Installing in model and connecting to receiver
SPECS: Speed: 0.12 sec/60° at 4.8V
0.10 sec/60° at 6.0V
Torque: 38.88oz-in (2.8kg-cm) at 4.8V
47.22oz-in (3.4kg-cm) at 6.0V
Weight: 0.66oz (19.0g)
Size: 1.17 x 0.47 x 1.16" (29.8 x 12.0 x 29.6mm)
COMMENTS: The following replacement parts are available;
Gear Set, HRCM6386
Horn Set, HRCM6326
BOX DIMENSIONS: 1.88" W. X 1.50" H. X 2.00" L.
BOX WEIGHT: .07 LBS.