Includes: (1) 20" Rocker Board (1) 20" Wobble Board (1) 15" Wobble Board (1) Rocker and Wobble Board Stand Use the 20" Rocker Board for basic balance work, then progress to the adjustable 20" Wobble Board for intermediate to advanced exercises. Use the adjustable 15" Wobble Board to enhance balance and increase ankle range of motion. Made with extra-strong birch wood that hold up to 500 lbs. Grip tape strips prevent slipping. Exercise instructions included.