Enhance your breathing performance with the help of our Lung Exerciser. Featuring a high-quality design, it will be able to enhance your respiratory performance. Designed with three balls, it helps you do deep breathing exercises in order to train your respiratory muscles and improve your lung capacity. Perfect for post-op therapy, this device is perfect for use both at the hospital and at home. For more information contact us: https://www.gstc.com/product/lung-exerciser/ »