Item Type: Respiratory ExerciserMaterial: Plastic, silicone .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; } 1Compact and Portable: Compact, premium break resistant plastic, balls inhaling breath measurement system. 2Firm Construction: Firm, sturdy , non shaky Construction; Removal bottom for thorough cleaning and maintenance. 3Respiratory Fitness: Deep breathing exerciser for comprehensive respiratory fitness, chambers for differing inhalation rates. 4Deep Breathing: The respiratory exerciser helps achieve optimum lung capacity and restoring disrupted breathing patterns. 5Universal Design: It can be used by anyone who is adult. A similar model of device is used by patients in pulmonary diseases clinics for exercise. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin