Silicone Vibration Dampeners for Tennis Squash Racket Pack of 4 (Tennis Icon) Embedded design, more flexible, and the racket firmly combined, the damping effect is prominent, Trolltech lovely pictures more beat to add a fun. Function: amplitude, effectively reduce production of ball impact the net reduction of conduction, effective protection, increase comfort resulting ease of tennis elbow. Effect: This racket with shock absorbers, weakened obviously feel the vibrations in hitting the ball, hit the ball with the change in residual sound This collection includes four dampeners, two red, two yellow. A great gift for tennis fanatics. The happiest tennis racquet vibration dampener set you'll find