The Nittaku Fastarc G-1 rubber is "Fast" with an "Arc"! A power topsheet with a built-in tension power sponge produces the ideal combination of ball speed and ball arc -- an outstanding powerful spin ball. 
G-1 means "Grip First" and S-1 means "Speed First" Choose Fastarc G-1 for more spin with great power, and choose Fastarc S-1 for more speed with great spin.
Speed: 95
Spin: 96
Control: 68
Hardness: Medium-Hard