(selected restrictions may apply)
This type rubber was first developed by chinese team and kept the secret for ten years until their leader ordered them to disclose the secret for the fair sportsmanship.
This rubber is designed to create unpredictable top spins, therfore it is unstable.
Some characteristics which are different from the normal long pimples first of all, the bottom lyer is much thinner in order to have maximum flexibility, and secondly, the surface of pimples are very rough in order to increase spin power.
It takes some time for you to get used with rubber, but it surely gives a hard time for your opponent.