TA360 VibAway Vibration Dampeners (6 & 3 Packs) for Tennis, Badminton, Racquetball & Squash- Smiley Packs - Racket Shock Absorber - String Silencer 6 Pack Mixed Reduce shock, string sound and vibrations plus provide more comfort while playing. Can help reduce Tennis Elbow Aggravation. Show your mood add some character to your raquet. Easy to install - fits between the center main strings at the lower hoop. Makes for a unique fun gift for you favorite tennis junky.