Head Graphene 360 Instinct PWR Tennis Racquet, 27.7 Performance Adult Racket 1/8 Grip, Unstrung $155.00 Head Djokovic Tennis Racket Vibration Dampener Racquet String Shock Absorber $19.15 Head Djokovic Tennis/Squash Dampener for Racquet/Racket Vibration Shock Absorber ...