The SL series uses the Muscle Tec string system, to enlarge the power zone of the racket by allowing the strings to move over a smooth rounded surface rather than being static as in conventional rackets. Muscle Tec enables the strings to be strung at a lower tension yet still gives a high tension feel. It also uses Nano Technology & Nano Superlight Resin. 70 Grams Frame Weight Superlight Nano Graphite
- Magnesium Gel Hi Flex Precision Shaft & High Flex Top Cap Double Grommet at Tee.. .