The Fire Vortex is the ultimate combination of two revolutionary technologies; ACS and Tube, offering you increased speed, spin and control. The ACS technology allows very high speed to be combined with maximum springiness/elasticity in an ultralight rubber with outstanding control. The Stige Tube bats are manufactured using a new technology where the middle veneer has gone through a revolutionary treatment. Stiga has programmed its high tech bat manufacturing machines to mill "microchannels" lengthwise in the middle ply of the bat. The channels are then filled with different materials depending on the bats desired characteristics.