Servo 7.6g-3 (2 pcs) Walkera HM-53Q-Z-21 for helicopter Dragonfly DF 53-Q (53Q). DESCRIPTION:WK-7.6-3:Dimensions: 22.5 x 11.5 x 24 mmWeight: 8.5 gTorque(4.8V): 0.9 kg/cmSpeed (4.8V): 0.11 s/600INCLUDES:Two servos.