Fast attacking version of the TENERGY family TENERGY 64 is the fastest attacking rubber of the TENERGY family; the No. 64 being the development code of the pimples used in producing this reversed rubber. 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. TENERGY 05 is recommended for playing close to the table; TENERGY 64 is for the attacker who plays for the offensive play in a middle distance. Speed: 13,5 Spin: 10,5 Hard: 36° 1.7 / 1.9 / 2.1 mm