This is a 16" diameter board only. MVP balance system is a modular balance system with 4 different non-skid platforms available and 5 different colour-coded instability balls to choose from. The platform stability can be altered creating various difficulty levels. The MVP balance system is perfect for balance, coordination, ankle and knee strengthening and rehabilitation, ankle range-of-motion  and flexibility, core stability, improved posture, and proprioceptive training. Each board can be used either as a wobble board, if 1 ball is inserted into the centre position, or rocker board, if 2 balls are inserted into opposing side positions. One ball can also be positioned off centre to aid in ROM and stretching activities. The smaller instability balls offer the least instability and the larger instability balls offer the greatest instability. Larger platforms can limit the instability. Individual components available independently or available in kits with or without wall hang storage racks. Color-coded Instability balls also for use with CanDo Multi-Axial Positioning System. This is a 16" diameter board only.