Prince AirO Hybrid Thunder Tennis Racquets Headsize 105 sq in Weight 9.9oz/280g unstrung Balance 12.7in/32.3cmA lightweight racquet featuring AirO hybrid technology at 6 & 12 o'clock along with triple threatProduces larger sweet spot across the entire swing bedLess aerodynamic drag creates faster swing speed105-square-inch head; measures 27 inches longLength 27.0-Feet Cross Section 23mm String Pattern 16 x 19 Composition GraphaluSweet spot expansion for an increased sweet spot.This racquet includes a coverThis racquet ships pre-strung Pre-Strung RacquetA lightweight pre-strung racquet for players of all skill levels, the Prince AirO Hybrid Thunder mid-plus tennis racquet offers an ideal blend of playability and control. The AirO Hybrid Thunder is outfitted with Prince's AirO technology, which replaces traditional pin-sized string holes with revolutionary giant O-Ports