This food designed tennis racket Dampeners are very easy to use and install. What you need to do is placing the tennis racket vibration dampener in the middle of two lines, and then you can enjoy your shot, no need to worry about , they will stay tightly. Features -Color:Multi -Material:Silicone -Size:2.60X2.20X0.80cm/1.02X0.86X0.31in -Premium silicone is very effective in ending string vibration and shocking absorption. Improved control of the racket, giving more comfort and consistency. -The vibration dampeners are very fit for many kinds of tennis racket. Professional and practical. -These tennis accessories are loved by almost all ages, they are a thoughtful and heart-warming present. -Lightweight, portable, easy to carry and use, it can bring you great convenience. -Installation is quite easy. Designed to improve the racket controlling and bring players more comfort. Package list: 6 x Tennis Racket Dampeners