The head graphene xt speed rev pro is a top of the range tennis racket that uses graphene xt technology to produce better weight distribution across the racket and increase the strength whilst keeping it lightweight the racket is supplied with a 1616 string pattern but this can be changed to 1619 to adapt to your game whether you prefer more power control or spin potential the head light balance makes the racket more manoeuvrable and it is supplied with an absorbent and tacky hydrosorb pr