Prince Ozone 1 Oversized Tennis Racquet (Strung with Cover) Specifications: Headsize:118sq. in Length:27.75 Beam Width:27-30-27 mm Weight Strung:270g/(9.5 oz.) Composition/Construction:Carbon Wave Matrix String Pattern(Mains X Crosses):16x19 Recommended String Tension:57-67 lbs. Power Level:1501 The Ozone One is composed of Princes Carbon Wave Matrix Construction making it one of best constructed lightweight racquets on the market. This re-engineered hitting zone adds extra strength and stability for a larger, more consistent sweetspot which in turn optimizes control. The open 16 x 19 string pattern allows players to experience more pop and bite on the ball without compromising overall playability. O-Ports -By replacing traditional pin-sized string holes with revolutionary giant O-Ports, a super aerodynamic frame has been created with a more responsive stringbed. This increases the sweet spot by 54%, creating a Sweet Zone