Dual ball bearings.
Digital and MOSFET amp programmable (see COMMENTS).
Indirect drive potentiometer for long life.
Narrow dead band width and high standing torque.
One Hitec HS-5245 Metal Gear Ball Bearing Digital Super Torque Mini Servo with the Universal with, four rubber grommets, four eyelets, one star shaped, one arm, and two arm straight nylon servo horns, one aluminum servo horn.