Description: 【Multifunction】: This Breathing Trainer is designed to enhance lung capacity and improve breathing control. It is an ideal choice for anyone who needs deep breathing exercises 【Lung Exerciser】: Lung Capacity Exerciser can help you effectively train lung capacity, abdominal muscles, core muscles, etc. It is a simple and practical professional muscle training tool 【Convenient and portable design】: Breathing Exercise Device for Lungs, compact and lightweight, easy to carry and store, convenient for you to use at home, office, or on the travel 【Reliable material】: The Respiratory Trainer is made of Silicone and Plastic materials. Humanized design ensures smooth and comfortable use. It is an ideal choice for family health management and fitness enthusiasts 【Flexible use】: Abdominal Breathing Fitness Equipment is flexible to use, allowing you to perform breathing exercises while sitting, lying, or standing. It is suitable for a wide range of users from beginners to advanced users, ensuring that various exercise goals are met Specification: Material: Silicone Plastic Size Chart: Height 18 cm/7.09 inch Diameter 5 cm/1.97 inch Package Includes: 1x Breathing Trainer Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.