Yonex ASTROX E13 The Yonex ASTROX E13 composite racket, crafted from a blend of aluminum and graphite, features a center balance design. This racket is tailor-made for beginners and intermediate players who favor an aggressive playing style. Furthermore, rackets in this category are equipped with cutting-edge technology to enhance performance. RGS (Rotational Generator System) - ingeniously distributed weight along the entire length of the racket ensures excellent impact and manoeuvrability, allowing for quick and consecutive shots with ease Yonex ASTROX E13