The SEAM, then the FOCUS, and the PRECISE
BI-Color ball was jointly developed by C.T.T.A. and DHS.
Selecte ABSas meterial, in order to better judge the rotation trajectory of balls.
Two colors of hemisphere are combined into one. While T.T. ball is under the high
speed-movement, it cause visual changing, which would increase the judgment on rotation.
Official BI-Colour balls prime competition:
2015, 2016 China T.T. championships
2015, 2016 Asia-Europe All Stars