Mini Exercise Ball - 9 Inch Small Bender Ball for Stability, Barre, Pilates, Yoga, Core Training and Physical Therapy HIGH QUALITY small exercise balance ball. The ProBody Pilates Mini Exercise ball is intended for core strength, balance, back rehabilitation and for toning and sculpting with Pilates, Yoga or other fitness exercises. INCLUDES ACCESS TO EXERCISES. Anti-burst balls do not include a valve, but rather have a plug to withstand high pressure. This requires a straw for inflation, which can provide some amusement while inflating. SOFT LOW-ODOR PVC MATERIAL that is free of the six common harmful phthalates: DEHP, DBP, BBP, DINP, DIDP, and DNOP. RECOMMENDED BY TRAINERS AND PHYSICAL THERAPISTS at home for good reason. Exercise balls are perfect tools to increase balance core strength, tone the inner thighs, and flexibility. The inflatable compact overball is perfect for men or women with hip, knee or sciatica issues. WE STAND BEHIND OUR PRODUCTS. Made to be burst resistant. Should it burst within the first 90 days of use we will gladly refund you as well as provide a new ball.