Material: Made of soft, and strong silicone, Can effectively prevent string vibration and damping, Add beauty to racket decoration. Features: Easy to install, slim enough to optimize your tennis game. Application: A great gift for players to improve the control of the racket in advance. More comfort and consistency. Colour:As Shown Material:Silicone Package Contents: 12 * Tennis racket shock-absorbing particles( 2 + yellow x 2 + black x 2 + green x 2 + white x 2 + blue x 2) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.