Item Type: Deep Breathing Lung ExerciserMaterial: PlasticSize: Approx. 13.4 x 14cm / 5.28 x 5.51inCapacity: 600ml, 900ml, 1200ml .wang-edit-text{ font-family:'Arial' important; } .wang-edit-text table { border-top: 1px solid 000; border-left: 1px solid 000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid 000; border-right: 1px solid 000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; } 1Colorful Balls: Breathing exercise tool includes 3 balls, with different colors, which can help you maintain and restore normal breathing. 2Healthy Lungs: Good breathing exercises help keep your lungs healthy, strengthen your respiratory system, and effectively prevent lung disease. 3Prevent Disease: Breathing lung exerciser helps to open your airways, prevent upper respiratory diseases such as mucus buildup, asthma, pneumonia, etc. 4Promote Oxygen Moving: The more breathing exercises you do, the more efficiently your lungs move oxygen around body, which can help you better fight agin disease. 5Stress Relieve: Breath exercise device makes you breathe deeply, help to clear your mind and get rid of the stress and anxiety that comes with daily work and activities.