Sriver is the most famous rubber used by table tennis players of all kinds from Advanced to beginners. The most recent addition to the SRIVER range was SRIVER FX (flexible). Sriver with a soft sponge underneath. SRIVER EL (elastic) with a mid-soft elastic sponge that has been specially selected so far for only some of out leading world ranked players. If wants to go for hard sponge, then you can choose the "normal" SRIVER. for a soft one, then SRIVER FX . But if the player requirement is in between the two and this is where most of the top players are placed, then SRIVER EL is recommend. EL's mid-soft sponge gives the best mix of power with control. It is best mix of power with control.