DESIGN: Sleek racket hoop design inspired by US Open Graphite composition provides excellent mix of control, feel and power with strong construction BLX - Basalt Carbon Fiber Composite reduces racket vibrations for better feel Double Holes grommet technology offers more power and a larger sweet spot Iso-Zorb grommets absorb shock for reduced vibrations Perimeter Weighting System improves torsional stability Midsized head provides enhanced feel and control Cushion-Aire Grip lends more comfortable grip on racket handle Pre-strung MEASUREMENTS: Head (sq cm): 645 Head (sq in): 100 Length (cm): 68.6 Length (in): 27 String Pattern: 16x20 Strung balance (cm): 34 Strung balance (pts): +0 Strung weight (grams): 283 Strung weight (ounces): 9.98 Taper System (mm): 22 FB Unstrung balance (cm): 33 Unstrung balance (pts): -4 Unstrung weight (grams): 269.32 Unstrung weight (ounces): 9.5