mks777HV777A+ Aluminum upper Casing (0.1 sec60° - 40.40 kg.cm (561.1 ozin) @8.2V).MKS Servo with Full Aluminum Case and Titanium Gears. The MKS HV Hh Voltage Servo series is desned to operate at hh voltage and low current, delivering hher torque per unit weht.