Yonex-EZONE Ai 98 Tennis Racquet-() Color: black/Lime; head size: 98Sq.In; weight: 310g/10.9oz length: 27in; material: H.M. Graphite B; nanometric; quake shut gel; stringing pattern: 16/19 For attacking, hard-hitting players producing powerful shots Evolved isometric technology provides maximum sweet spot with an improved grommet System, applying both deep and shallow grooves inside the frame Off-center hits the ezone ai delivers ultimate swing speed and maximum power even on off-center hits Nanometric material is used in the center and bottom of the frame. This trans-weight System gives quicker maneuverability