The best product that Friendship makes, for developing players or players who demand consistency from their game. 729FX-C, is an inverted spinney control rubber. If you have control issues, bad habits, hit the ball long, wide, etc, this rubber may help. It is a little slower than 729FX and the pip structure on the back of the rubber allows for more give. This rubber is still VERY sticky so generating spin through loop or serve will be no trouble.
Available in 1.0mm, 1.8mm, 2.0mm & 2.2mm