Rubber Vibration Damping Pad for F3/F4 Flight Controller 

Features:
In order to reduce the connection between the flight control and quadcopter frame, after a long test, this specifically designed damping pad which use excellent ultra-soft while tough rubber material, easy to install. On the shock-absorbing effect can be significant. High frequency vibrations transmitted to the vehicle abatement head off on that definition aerial damage rate is greatly reduced.

Length: 7mm rubber/ 4.5mm screw length
installation groove diameter: diameter of 5.8mm 
Package weight: 2.3 g per set

Package list:
4pcs * Shock Absorption Damping Ball