This is the Hitec/RCD HS-425BB Pro servo with a Universal Futaba J, Hitec S, JR and Airtronics Z connector. As one of Hitec's longest running production servos, it has proven to be a durable and dependable product year after year.
Includes: One HS-425BBS servo and one servo accessory bag (grommets, screws, bushings, horns)
Note: This servo shares the same case with the HS-300 servos. The biggest difference is that this servo has dual ball bearings, making it faster, with more torque, and less slop.