This product is an extension of the Tibhar Quantum series. The rubber was developed in close cooperation with Shang Kun, a star player in today's German Bundesliga. According to Shang Kun, the Quantum X Pro is a perfect backhand rubber for top-class players. It is a bit harder and has more direct contact with the ball when compared to the Evolution MX-P rubber. The Quantum X Pro is extremely efficient in close to the table game, putting the enormous pressure on the opponent. It is truly, a pro rubber.