HS-5585MH High Voltage High Torque Digital Metal Gear Servo from Hitec - HRC35585S
The HS-5585MH High Torque HV metal gear digital servo was designed to run on a 2-cell 7.4V LiPo battery to give you extra torque and speed. Featuring a heavy-duty metal gear train and Hitec's exclusive programmable digital circuit for reliable, durable performance, these servos can be used in a wide range of applications.
Features:

Coreless motor optimized for 7.4V operation
Heavy-duty metal gear train with dual ball bearings
Water and dust resistant
G2 high resolution digital amplifier with MOSFET drive
Two year limited warranty through Hitec beginning at date of purchase

Includes:

1x HS-5585MH high voltage high torque digital metal gear servo with universal connector
1x 1.3" (34mm) Double arm horn
1x 1.2" (30mm) Single arm horn
1x 0.94" (24mm) Round horn
1x 1.2" (31mm) Four point horn
1x 0.87" (22mm) Aluminum single arm horn
Mounting hardware