Yonex EZONE DR 98 (310g) Tennis Racquet - Unstrung Zone speed 7% more ball speed. Ezone Dr players generate 7% more ball speed compared to competitive racquets. The zone Dr racquet places power firmly in players' hands, even on off-center shots Increased frame Snapback. Embedded within the inner portion of the frame between the 2 and 10 o'clock positions. Nano metric Dr material dramatically enhances frame Snapback. Quake shut gel Zone Dr 98 for attacking, hard-hitting players producing powerful shots Head size: 98 sq. In. Weight: g 310Grams/10.9oz length: 27 in. Material: H.M. Graphite, Nano metric Dr, quake shut gel+ Width range: 23.0mm/24.0mm/19.0mm balance point: g: 310mm, recommended String: poly Tour Fire 125, poly Tour Pro125, atg850p stringing pattern: 16/19 stringing advice: 45-60lbs