The Nitakku Fastarc G-1 is the fastest in th eFastarc series. The NITTAKU Fastarc G-1 rubber is "Fast" with an "Arc"! A deadly combination seldom found in new age rubbers! A powerful topsheet with a high tension sponge produces the ideal combination of ball speed and ball arc -- an outstanding powerful spin ball. A bit of tackiness also adds to the spin and control