The MVP offers an unstable and sensory-stimulating platform to facilitate balance and proprioceptive training and postural reactions. The lightweight board can be taken anywhere. The boards can be used for: balance, coordination and proprioceptive training; ankle and knee strengthening and rehabilitation; core strengthening and stability; ankle range-of-motion and flexibility; and improved posture. The MVP boards have a slip resistant textured top surface. The boards have three stainless-steel insets on the bottom (five insets for the rectangular board) to accommodate the "screw-in" instability ball(s). To use the board as a rocker simply insert two balls into the stainless-steel insets on the bottom of the board. This allows the board to move in only one plane of instability. To use as a wobble board place one ball in either the center inset or in one of the extremity insets. This allows the board to pivot in multiple planes. interchange different color instability balls to change level of vestibular challenge. Each board has slots to tie exercise band or tubing for a more dynamic vestibular challenge! PLEASE NOTE: THIS IS AN ADDITIONAL HEMISPHERE ONLY. The image above is only representative. This is NOT the full Rocker Board.