Our {600CC-900CC-1200CC 3 ball spirometer breathing trainer breathing exerciser} is a top-quality product designed to improve respiratory function and lung capacity. As a trusted and experienced factory, we are proud to offer a wide range of effective respiratory products that are both affordable and reliable. Our spirometer breathing trainer is available in three sizes, making it suitable for people of all ages and fitness levels. Each version features three balls that rise as you inhale and fall as you exhale, providing a clear visual cue to help you monitor your breathing. With regular use, our spirometer breathing trainer can help you build stronger lungs, increase stamina, and reduce the risk of respiratory diseases. Order now and experience the benefits of our high-quality products!