Airplane Multi-Pack - 4 Pack of HS-425BB Deluxe Ball Bearing Plastic Gear Standard Servos from Hitec - HRC31425S
The HS-425BB is a quality standard servo 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 product year after year.
Features:

Convenient four pack of Hitec servos is perfect for balsa ARF models
Higher torque than other standard servos
Dual ball bearings
High-performance circuitry
Resin gears

Includes:

Four (4) Hitec HS-425BB Deluxe ball bearing plastic gear standard servos with universal connector
Four (4) servo accessory bags (grommets, screws, bushings, horns)