Hitec HS 75BB Retract servo
With its low profile design, strong torque and precision movement the HS-75BB is a great choice to move your retract gear in the realistic manner that you want it to. Note, this is a retract or “bang bang” servo and only travels from one end to the other (180 degrees.) If you require a proportional servo this size, use the Hitec HS-77BB.
* Size : 44 x 23 x 25 mm
* Weight : 35 g.
* Torque 4.8/6.0v : 6.6 / 8.2 kg.
* Speed 4.8/6.0v : 0.45 / 0.34 Second