Wacces,'s Anti-Burst Professional Stability Ball is a safe, durable ball with burst resistance to 500-lbs! This ball is perfect for weight training on the ball as well as users looking for extra performance for health club settings & other heavy-use applications. Wacces Exercise Ball with free pump included. Incorporate the versatility and effectiveness of the Wacces exercise balls into your workout. Core strength training is the only way to exercise. You can take your exercise balls with you wherever you go or exercise at the convenience of your home. Whether you are new to fitness or a seasoned athlete, this ball will enhance your workout giving you results. Ideal for stretching, strengthening and toning exercises. First used by physical therapists over 30 years ago, Exercise Balls are now used in leading health clubs around the nation and are quickly becoming a standard item for any home gym. The Wacces Fitness Ball is safe, durable, and easy-to-use.