Carlton Power-Surge 700 Badminton Racquet Isometric head shape - By increasing main string length, the sweet spot area is maximized generating more power and ensuring a higher percentage of shots are hit with perfect timing. Frame weight: 89g Construction: Graphite Balance: Head Light Flexibility: Medium; Length: 670 MM; 3/4 headcover Construction: Graphite Balance: Head Light Flexibility: Medium; Length: 670 MM; 3/4 headcover