HS-5055MG 9g Digital Metal Gear Micro Servo from Hitec - HRC35055S
The Hitec HS-5055MG is a high quality low cost 9g "sized" digital servo with metal gears. It is light weight and a good choice for most planes with 9g servos. The Metal gear train is very reliable and the servo is digital for ultimate resolution. The servo features a universal connector which works with nearly all receivers. It will fit Futaba J, Hitec S, JR, and Airtronics Z-type Connectors. See specifications tab for full specs.
Features:

Metal gears
Light weight
Universal connector
Digital
Programmable

Includes:

One Hitec HS-5055MG Micro Digital Servo with preinstalled X-shaped servo horn and screw
One 28mm straight servo arm
One 31mm servo arm
One 54mm servo arm
One 1.6x3.75mm button head screw
Two 1.7x8mm flanged button head screws