Head graphene extreme pro tennis racket heavier and stiffer than the extreme model the head graphene extreme pro tennis racket is ideal for aggressive players with an impressive 113 points head light balance with an open 16 x 19 string pattern and 100 square inch head size for all the power and spin youll ever need this head tennis racket also incorporates graphene into the shaft reducing the weight in the middle of the racket increasing head speed for massive power potential tennis