This is the Savox SW-0250MG Waterproof Metal Gear Micro Servo. This servo boasts great speed and torque specs, along with waterproof capabilities, dual ball bearings and full metal gears. This servo is a great addition to any Traxxas 1/16 scale vehicle.
Speed @6.0V: 0.11 sec/60
Torque @6.0V: 69.4 oz-in (5.0 kg-cm)
Tooth Spline: 21