Tenergy 64 is the fastest attacking rubber of the Tenergy family. Butterfly High Tension technology has enabled a fast dynamic rubber to be produced by utilizing the innovative Spring Sponge. Spring Sponge enables a player to grip the ball and catapult the return back at high speed and with heavy spin. The No. 64 was the development code of the pimples used in producing this inverted rubber. While Tenergy 05 is recommended for playing close to the table, Tenergy 64 is for the attacker who plays an offensvie game from middle distance. Surface: Inverted Speed: 13. 5 Spin: 10. 5 Density: 36 To get the most out of your rubber, it is recommended that you clean it after each use and store it properly. Using our Racket Care Kit, use one pump of the Spin Refresh on each side of inverted rubber, then use the Rubber Care Sponge to thoroughly clean it. Once it is dry, apply your protective sheets and then place it in your case. Ideally, store your paddle in a climate-controlled space and avoid extreme temperatures for extended periods of time.