HS-65MG Metal Gear Sub-Micro Servo from Hitec - HRC32065S
The HS-65MG is considered one of the most powerful servos in the micro class, offered with a choice of “shock resistant” Metal or “zero wear” Karbonite gears. The 65 series features a top-ball bearing for long life and positive centering, 31 oz-in (2.2kg-cm) of torque at 6 volts and is an excellent choice for higher performance micro helicopters and electric park flyers.
Features:

Small, lightweight, high speed, and high torque servo
One of the slimmest micro servos available
High efficiency Neodymium magnet motor
Top ball bearing
SMT technology

Includes:

1x Hitec HS-65MG metal gear sub-micro servo with universal connector
4x M1.7x7 servo mounting screws
1x Two-sided servo horn
1x One-sided servo horn
1x M1.7x3 servo horn screw
1x Four-sided servo horn