Wilson Pro Staff Precision 103 tennis racket features a midsize head making it ideal for players who want a blend of feel and control. Features include: Perimeter Weighting System - extra weight is placed at 3 and 9 o'clock to increase torsional stability. BLX technology - Basalt a natural volcanic rock which is ground into gold fibres and woven together with Karophite Black to produce the most advanced composite used in tennis rackets. Basalt offers the ultimate vibration resistance to provide superb feel. Racket is supplied strung but without a cover.