HS-55 9 gram servo from Hitec - HRC31055S
The Hitec HS-55 is a high quality low cost 9g "sized" analog servo. It is light weight and a good choice for most planes with 9g servos. The resin gear train is very reliable and the case is one of the slimmest available.  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:

Resin gears
Light weight
Universal connector
Slim case
10" wire length

Includes:

One HS-55 Servo w\/pre-installed small X-shaped servo horn and screw
One very small straight servo horn
One M1.7x3 servo horn screw
One small straight servo horn
Two M1.7x7 servo mounting screws