20 Wobble Board (tilt angles of 12,14, and 16 degrees)" The adjustable 20" Wobble Board is for intermediate to advanced exercises. Made of extra-strong laminated birch that holds up to 500 lbs Tops covered with grip tape to prevent slipping. The base tilts and rocks to challenge balance and proprioception of patient and athlete. Increase or decrease difficulty of the Wobble Board by raising or lowering height.