This best-selling racket, perfect for the fast-paced game and the quick swings it demands, has been further upgraded with new Auxetic technology for a sensational feel. Head Size: 100 sq in Length: 27.0 in Frame Thickness: 25mm Weight (Frame): Average 285g Balance (Frame): Average 320mm String Pattern: 16/19 CPI (Control Power Index): 700 I bought this when it was released and used it 5 or 6 times. It's light and easy to use. As you can see in the photo, the strings were installed at Alpenshinjuku.