Overview Reviews Product Description 2-in-1 board (rocker and wobble) improves balance and stimulates muscles. 4" center ball is for aggressive training, 3" ball for beginner. Product Videos Custom Field Product Reviews Write a Review Write a Review × Chango Chango S-2000BA 15 x 8" board, with 3" ball Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *