Milliken Medical Theraband Exercise Ball, 18", Yellow, High Quality, Increases Flexibility and CoordinationThera-band Standard Exercise Balls are inflatable balls used to strengthen muscles to improve posture which helps prevent back pain. They increase flexibility and coordination.

• Thera-band Standard Exercise Ball is made of durable PVC
• Can be used for physical therapy, yoga, pilates, and general core strength training
• Includes 2 plugs and inflation adapter
• Includes exercise ball guide poster detailing 24 exercises
• Five sizes are provided to allow for user height variations
• Capacity: 1000lb