Sqpw Expiratory High Altitude Lungs Breathing Training Respiration Exercise

Material:SiliconeSize: 5*10cmPackage include: 1 xBreathing Exercise Device NotePlease allow 2-3 cm difference due to manual measurement. Besides different computers display colors differently, the color of the actual item may vary slightly from the below images, thanks for your understanding(1 inch = 2.54 cm)