We recommend DONIC DESTO F3 BigSlam to the following players.DONIC DESTO F3 BigSlam is recommended for players who have previouslyused speed glue and for those who value sound and outstanding ballcontrol qualities rather than maximum speed. BigSlam will be apopular choice once speed glue is banned. Available: in Red and Black- 1.8mm / 2.0mm / MAXThe sound of speed gluing has been captured in F3 BigSlam rubbers:F3 BigSlam generates a loud crack when you hit the ball!This is the loudest DESTO FORMULA rubber that DONIC has ever produced.DONIC DESTO F3 BigSlam reproduces the loud sound that you got duringthe classic times of speed gluing. However, this rubber does notrequire speed glue and must not be speed glued! The distinctive soundhas been firmly and permanently incorporated into the rubber. BigSlamis somewhat softer, but not significantly slower than its successfulsibling DESTO F3. It has the same amazing simple ball control, butgives the same effect as optimum speed glue. Whether you prefer DESTOF3 or DESTO F3 BigSlam is a matter of taste – or, should we say, ofsound preference.