Description: 【Material】: Made from pp material, Breathing Exercise Device offers comprehensive respiratory muscle training for various users 【Breathing Exercise Enhancement】: This breathing dumbbell is designed to help improve lung capacity and breathing control, catering to various deep breathing training needs 【Endurance Boosting】: Ideal for both inhalation and exhalation exercises, this lungs breathing exercise device enhances endurance during high intensity deep breathing workouts 【Portable Design】: Suitable for most individuals, this lung trainer can be used effortlessly whether you are sitting, lying down, or standing. With size 16 cmx3.8 cmx3.8 cm/6.30 inchx1.50 inchx1.50 inch 【Compact and Portable】: With its lightweight design, this breathing dumbbell lung trainer is easy to store and carry, making it great for use at home, in the office, or while traveling without location constraints Specification: Material: PP Size Chart: 16cmx3.8cmx3.8cm/6.30inchx1.50inchx1.50inch Package Includes: 1 Breathing Trainer Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.