Carlton Ultrablade 300 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: 100g Construction: Titanium Alloy/Tempered Steel Balance: Head Light Flexibility: Medium; Length: 665 MM; 1/4 headcover Construction: Titanium Alloy/Tempered Steel Balance: Head Light Flexibility: Medium; Length: 665 MM; 1/4 headcover