The Carlton™ Aeroblade 4000 Badminton Racket has a isometric head shape increases the main string length with a larger sweet spot area that generates greater power and ensures a higher percentage of shots are hit with perfect timingFeaturesConstruction: Titanium Alloy/Graphite.Flexibility: Medium.Head shape: Isometric.Length: 665mm.Balance: Event.Frame Weight: 90g.String Tension: 18-28lbs/8-13kgs