Features 1 CNC full metal aluminum shell2 High precision metal gears made in Taiwan3 Double ball bearings4 8 4V high voltage digital brushless servoDescription Brand QX MOTOR Item Name Metal Digital Gear Servo20KG QX MOTOR QX 6120MG Digital ServoOutput gear 25tTorque 6V 20 5kg cmTorque 8 4V 23 8 kg cmLimit angle 180°Bearing Type Ball Bearing x 2Speed 0 13 sec 60° 6V │0 1 sec 60° 8 4V Operating Voltage 4 8 8 4 DC VoltsWeight 79gMotor type Carbon brush motorGear Type MetalOperating Temperature 25℃ 70℃Working frequence 1500μsec 50 330hzSize 40 x 20 x 39 8mm 40KG QX MOTOR QX 6140MG Digital ServoOutput gear 25tTorque 6V 38 5kg cmTorque 8 4V 42 3 kg cmLimit angle 180°Bearing Type Ball Bearing x 2Speed 0 28 sec 60° 6V │0 21 sec 60° 8 4V Operating Voltage 4 8 8 4 DC VoltsWeight 81gMotor type hollow cupGear Type MetalOperating Temperature 25℃ 70℃Working frequence 1500μsec 50 330hzSize 40 x 20 x 37 5mm60KG QX MOTOR QX 3160MG Digital ServoOutput gear 18tTorque 6V 58kg cmTorque 8 4V 70 kg cmLimit angle 180°Bearing Type Ball Bearing x 2Speed 0 13 sec 60° 6V │0 17 sec 60° 8 4V Operating Voltage 4 8 8 4 DC VoltsWeight 158gMotor type Carbon brush motorGear Type MetalOperating Temperature 25℃ 70℃Working frequence 1500μsec 50 330hzSize 65 x 30 x 48mmPackage Included 1x Metal Digital Gear Servo