Karakal BTI 130 Our most popular shaped frame over the years now incorporates the \'Muscle Tec\' string system, designed to increase the sweet spot of the racket by allowing the strings to move freely over rounded raised grommets, so it can be strung at a lower tension yet gives a high tension feel. BX Series: *Muscle Tec Stringing *Groove Power System *\'A\' Power Mono-Shaft *One Piece Construction *Midplus Head - 470 sq cm *Full Racket Cover BX-130: *130 Grams Frame Weight *90% Nano Graphite - 10% Ti *Nano Superlight Resin
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