Description: 【Quality Materials】: Crafted from PP material, this Breathing Exercise Device offers weighted deep breathing exercises, ensuring durability and security during use 【Enhanced Lung Capacity】: Designed to improve lung strength, this Lung Traing device offers both exhalation and inhalation training modes, catering to various respiratory training needs and helping users enhance their endurance effectively 【Adjustable Resistance for All Levels】: Suitable for everyone, our lung exercise device allows users to adjust resistance by adding or removing weighted blocks, accommodating different training intensities and fitness levels 【Precision Pressure Thresholds】: The Training Device features a quantifiable design where the pressure threshold is determined by the precision weight of the blocks used, providing accurate resistance values for effective respiratory workouts 【Ergonomic Design】: Featuring a mouthpiece designed according to human bionics principles for optimal lip breathing practice guidance Specification: Material: PP   Size Chart: 16 cmx3.8 cm/6.30 inchx1.50 inch Package Includes: 1 Set Breathing Exerciser Note: Please allow slightly errors due to manual measurement and different monitors.