Mini waterproof servo TR-4, specific for Traxxas TRX-4. Having compatibility with high voltage 6V-8.4V, at 7.4V input the servo pulls up to 2.6kg-cm of torque at a speed of down to 0.10s. A long 35cm receiver wire and mini size of 22.5 x 12.5 x 24.0 mm ensures the servo is a direct fit in Traxxas TRX-4. The TR-4 servo comes with 25T metal spline and special gaskets make it waterproof for go-everywhere capabilities.