Features:The hard alumite aluminum gearCoreless motorDual ball bearingsThe hard servo gear shaftThe aluminum heat sink middle caseBlack cableGold plated connectorSerial CompatibleHCS CompatibleSpecifications:Torque: 12.5Kg-cm Speed: 0.09sec/60deg(@7.4V)Torque: 11.8Kg-cm Speed: 0.10sec/60deg(@6.0V)Dimensions: 40.5x26x21mm (Low Profile)Weight: 50.5gServo Lead: 180mmOperating voltage: 6.0~7.4V (Lipo,Life,Ni-MH)