2 Head 98, string 18x20, both strung,  exel/luxilon , both 17 gage. Suggested use A player open player, professional. Model used by marat safin, Tommy hass, Warinka previously, marin cilic a newer one Please see the photos minor cosmetics, condition 8.5 to 9.0 out of ten.... ...... Interested should know enough detail about these racquets. It is a futuristic material with abnormal behavior characteristics. More specifically, D3O belongs to a subcategory of "dilatant foams," which dramatically change their behavior under dynamic loading or impact. The new HEAD Innegra is used in this racquet's structure to integrate into the racquet for shock absorption and improved stability. As a result, vibrations are reduced by up to 17% on ball impact for unique control and precision. The beam of the racquet is 19mm, with a 98" head size. Integrated in the lay-up and positioned in the shaft area of the racquet. The racquet weighs 11.x oz and is 1 1/3" HL in balance. This frame uses D3O, which belongs to the smart materials category. The string pattern is 18/20 and the racquet is standard in length, 27".