Considered one of the most powerful servos in the micro class, the HS-65 is 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 ounces/inches of power at 6 volts and is an excellent choice for higher performance micro helicopters, electric park flyers, and 1/18 scale cars.