Airplane Multi-Pack - 8 Pack of HS-7245MH High Voltage High Torque Digital Metal Gear Mini Servos from Hitec - HRC37245S
The HS-7245MH 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:

Convenient eight-pack of Hitec servos is perfect for balsa ARF models

Ideal for electric powered 500\/600 class helis, 1\/12-1\/18 scale gliders, balsa ARFs, and electric aircraft

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:

8x HS-7245MH high voltage high torque digital metal gear mini servos with universal connector
8x 1.3" (34mm) Double arm horn
8x 1.2" (30mm) Single arm horn
8x 0.94" (24mm) Round horn
8x 1.2" (31mm) Four point horn
8x 0.87" (22mm) Aluminum single arm horn
Mounting hardware