Material: aluminium 6061-T6 (anodized)
COLOR : Silver
Length :2.5inch 
Fixing screw bolt is M3 1 Per package Bolt is not included 
Weight: 3.2g
Installation Guide - Follow aircraft manufactures recommendation for Servo control horn set up - LockTite all servo screws - Install ball link on bottom of servo arm (where possible) - Keep all linkage tight - Servo arms longer than what is recommended can cause - The Hitec 8XXX series servos must use Futaba type.