The HEAD Graphene 360+ Extreme PWR Tennis Racquet is far and away the most powerful racquet in the franchise. Graphene 360+ places Graphene in key portions of the head and shaft, while Spiral fibers in the lower hoop provide a more comfortable flex and a softer feel. The Extreme PWR is the only extended length model in the Extreme family. At 27.7 inches long, it provides extra coverage around the net, and plenty of power and spin.