- Hitec HS75BB Retract Servo Metal Gear/BB
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With its low profile design, strong torque and precision movement, the HS-75BB is a great choice to move your retract gear in a realistic manner that you need. 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