Hula Hoop Weighted 2 lb - Magnetic Therapy Massage Weight Loss Fitness Abdominal Exercise Burns 100 Calories in 10 minutes 40 Massaging Magnetic Balls on the inner ring. (5 balls on each joint) Weight: 2 lbs Great equipment for exercise and weight loss Size adjustable from 26 diameter (6 joints) to 31 (7 joints) and 36 (8 joints)