HEAD Graphene 360 Speed Lite Tennis Racquets : The Head Graphene 360 Speed Lite tennis racquet is perfect for passionate players who want a supremely lightweight, powerful frame. A larger sweetspot and built-in Graphene 360 technology makes this racquet truly unique. With these benefits, players can hit with a greater control and enhanced energy transfer for more power and ball speed. The specified 16 x 19 string pattern allows for adding spin to shots for more varied game play. Features excellent handling and power in an ultra-lightweight frame. Includes new Graphene 360 technology for more stability. Speed Series endorsed by Novak Djokovic .