1] Material: 100% Graphite 2] Construction: 2 pieces / long body 3] Frame composition/Spec: H.M. Graphite / 11 mm 4] Shaft spec/Flexibility: 7.5 X 4.3 mm / Medium 5] Weight: 3U ( 85 ?nbsp;88 g ) 6] Balancing: 280 - 295 mm 7] String tension: 20 - 26 LBS 8] Length: 675 ± 5 mm 9] Grip size: G2 / High quality PU grip with pattern 10] String / Cover: None 11] Level: Professional / Double player / Defensive 12] Star Level: (4star)★★★★☆ 13] Nature for NANO: NANO is an extremely light but durable material. It? commonly use in aerospace industry. The reinforcement in critical parts increases the strength of the racquet to withstand higher stringing tension. It? also help to manufacture more powerful racquet with lower risk of breakage. Long shaft enable player to generate extra power and deeper angle of attack as well.