As a high-performance racquet brand, our goal is to develop product that meets the needs of all players. Through longterm dialogue and playtesting with ATP and WTA touring pros, the O3 Hybrid Tour provides another option for serious competitive players to make the switch to O3 Engineered technology. The O3 Hybrid Tour features O-Ports at 3 and 9 o'clock around the perimeter of the frame, increasing racquet head speed and providing more spin and power for the advanced player. Specifications: Headsize: 95�€� Strung Weight: 12 oz. Length: 27�€� String Pattern: 16X18 Strung Balance: 8 points HL Beam Width: 21 mm Straight Beam String Tension: 51-61 lbs. Product Reviews: �€�Good pop on serves and returns, with a feel string like excel premium it plays great but the wide pattern cuts them way to easily. I have switched to Babolat pro hurricane and am playing around with tensions to get the same control, I replaced my Liquidmetal Prestige for these because of the power difference, also the grip that price has been using is to round and I cannot feel the bevels. Lost the cushion grip and put 3 tourna grips on to get the head grip.�€� - Daniel, Jackson, MS