This is the Hitec HS-430BH Standard Deluxe High Voltage Servo.
FEATURES: For .20-.60 size airplanes, all electric and glow powered 30 class
helicopters, and steering and throttle in cars, trucks and boats
6-cell NiMH and 2-cell LiPo compatible
Dual ball bearing equipped
Direct potentiometer drive
INCLUDES: Hitec HS-430BH Servo, 0.92" (23.5mm) Round Horn, 1.2" (30mm) 4-Point
Horn, 1.7" (43mm) 4-Point Horn, 1.2" (32mm) Double Arm Horn, 1.2"
(30.5mm) Single Arm Horn and Mounting Hardware
REQUIRES: Installing in model and connecting linkage
SPECS: 6V 7.4V
Operating Speed: 0.16 sec/60° 0.14 sec/60°
Output Torque: 56.93oz-in (4.1kg-cm) 69.43oz-in (5.0kg-cm)
Weight: 1.6oz (45.5g)
Size: 1.59 x 0.77 x 1.44" (40.6 x 19.8 x 36.6mm)