At 170 grams, the Graphene 360+ RADICAL 170 is designed for those who look for power. It is slightly heavier than the 160 version and comes more evenly balanced, which means that it packs a lot of power in an extremely maneuverable design. It features the new Graphene 360+ technology, a combination of Graphene 360's energy transfer and innovative spiralfibers for an enhanced flex and clean impact feel. In addition, it comes with HEAD's Inner Grommet System for optimal stiffness and a solid feel. We also lengthened the main strings by creating molded tubes in the throat of the racquet. These Power Channels™ increase the stiffness in the throat for an incredible amount of raw power. While used by top pro players, the RADICAL 170 brings state-of-the-art power to the masses.