This is the Hitec HS-425BB Deluxe Ball-Bearing Universal Servo. This servo has a universal servo connector, so it will work with all current JR, Hitec, Futaba, and Airtronics Z radio systems.
HS-425BB is offered with dual ball bearings, impact resin gears, and high performance circuitry. As one of Hitec's longest running production servos, it has proven to be a durable and dependable servo year after year.
INCLUDES:One HS-425BBS ServoOne Servo Accessory Bag (grommets, screws, bushings, horns)
SPECS:Length: 1.59"Width: 0.77"Height: 1.44"Weight: 1.60ozTransit Time: 0.21 / 0.16 sec @ 60 deg.Torque: 45.93 / 56.93 oz.in (4.8v/6v)