New Yasaka rubber - Rakza 9 The latest addition to the Rakza family with improved speed characteristics. The surface rubber of Rakza 9 has a newly developed formula/rubber combination. In addition the new sponge is made of a more homogenous material and has larger pores. Rakza 9 is the fastest of Yasaka's Hybrid Energy rubbers and is suitable for technical offensive players using both high speed and spin to win the point. Its Yasaka's answer to the popular Tenergy series from Butterfly Available in Max sizes only, in stock now Rakza 9 was introduced during World Championships in Dortmund in March. Many of the visitors showed a great interest.