Name: 6V20kg-cm Digital Servo;                             
Size :A: 40.2mm B: 20.1mm C: 38.8mm D: 48.0mm E: 10mm;                                                                   
Weight:56g ±0.2(1.46oz);                                               
Gear type:Titanium Gear;                           
Speed:0.13sec/60º at (6V)
      0.15sec/60º at (4.8V)
Torque:(277.8 oz-in)20kg.cm.at(6V)
       (238.9 oz-in)17.2kg.cm.at(4.8V)                                                       

the features:Waterproof; Plastic case, resist heat and corrosion; Aluminium middle hull, easy to eliminate heat;Adopt high quality coreless motor.