The vibration dampers is made of modified PVC. Be different from normal PVC, it is more sturdy and aging resistant. The range of temperature is -55??+120?? It is used on the cables for ADSS with the diameter less than 12mm or ADSS. It can reduce the hang static stress, increase the antivibration ability of the cables. It also overcome the dynamic stress of wind-force vibration and reduce the crooked stress of the optical cables. The customers can match freely according to the demand. It need no when the span less than 100m, two sets for span in 100-250m, four for span in 250-400m, six for span in 400-800m.