Super Large Torque - Maximum torque of servo is 6.0V up to 24 kg f / cmVery strong, excellent range of motion, and includes a metal horn.; Excellent Quality - DS3218MG Servo Motor not only has gears undergoing hard oxidation treatment, but also has an aluminum alloy case with good heat dissipation performance, in addition, the entire motor has somehow waterproof function; High Precision - Metal servo using dual ball bearings design and advanced potentiometer to make sure the high linearity and accuracy of the servo; Standard Size Wide Range of Applications - 1.58 x 0.79 x 1.60 inch (40x20x 40.5 mm), Weight: 2.4 oz 68.2 gPerfect for most RC cars, robot joints, 1 / 8 RC truck, extreme scx10, vehicles, any crawler etc.; Professional After-sales Guidance - Yahboom provides excellent after-sales service. If you have any product problems, you can contact Yahboom for help