Feature: 1. PERFECT ACCESSORIES: The soft, shock absorbing silicone effectively reduces vibration when hitting the ball, keeping the racket stable and improving control. 2. FUNCTION: This is a shock absorber that allows the racket to absorb both string and frame vibrations when hitting the ball.The shock is partially absorbed by the silicone dampener, lessening the stress on your arm and reducing vibrations. 3. RECYCLABLE: This tennis racket shock absorber is made of silicone, which is soft, light and strong. It does not harm human body. It uses recyclable materials, which and practical. 4. SATISFYING FEEL: Easy to install and close to the racket, small and slim, reduce string vibration, and improve comfort and hand feel. 5. SIMPLE DESIGN AND STAIN RESISTANCE: The elegant and simple style is suitable for all kinds of tennis rackets, whether for use by yourself or for tennis lovers. And black is not easy to get dirty and the silicone is easy to wipe. Specification: Item Type: Tennis Vibration Dampener Material: Silicone Color: Black Weight: Approx. 30g / 1.1oz. Package List: 4 x Tennis Vibration Dampener