DESC: THE BOSU BALL IS THE LATEST TOOL FOR COACHES TRAINERS SPORTS TEAMS AND INDIVIDUALS SEEKING TO IMPROVE CORE CONDITIONING AND BALANCE.IT CAN BE USED WITH THE PLATFORM SIDE EITHER UP OR DOWN FOR A WIDE RANGE OF BALANCE CHALLANGES.AN INNOVATIVE APPROACH TO EXERCISE FOR THE AVERAGE PERSON TO THE HIGHLY TRAINED ATHLETE..WEB DESCRIPTION:Bosu Ball .Diameter:25 .Misc:Includes: Step Pump Valve Plug Owner's Manual Tennis DVD and Fitness Quest Eating Plan.