XTORQUE CFK Servo Arm TypA, 38 mm, FUTABA
This Servo Arm is from very strong carbon-plastic. It fits much better on your servo as the standard horn.
The lenght of 38 mm is the lenght you can use for all big Acrobatic Aircrafts. The horn is much stronger than the normal standard horn.
This is what you need for your plane!
The price is for one piece!