Feature:1. Manufacturing Material: Made of high purity silicone material, not easy to aging, long service life, soft and durable, and good elasticity.2. Easy Assembly: The damper knot is easy to install. Tie it on the tennis racket wire to prevent it from falling off. Strip shaped shock absorber knot, damping effect is remarkable.3. Good Shock Absorption Effort: Helps reduce shock while adding a cool dampener, offers excellent comfort and shock absorption. Have some fun while dampening string vibrations.4. Super Long Shock Absorber Knots: Long shock absorber knots set, with 7 kinds of color combinations, strong tensile ability, can be used for a long time.5. Easy to Use: Tennis racket vibration dampener knot, easy to use and fine workmanship. Without any difficult requirements even though you use it for the first time.Specification:Item Type: Tennis Racquet KnotWeight: Approx.17g / 0.6ozMaterial: SiliconeColor: Black, Red, Blue, Yellow, Transparent, Rose Red, Fluorescent Yellow.Package List:7 x Tennis Racket Shock Absorber Knots