Overview Highlights There are different measurements,which can be used for lung breathing training for different people. Good breathing exercise helps keep the lungs healthy. Regular breathing exercise can not only strengthen the respiratory system,but also prevent lung diseases. Help you breathe properly. Train deep breathing to help you open and clear the airways. This helps prevent upper respiratory tract diseases such as mucus accumulation,asthma,flu,etc. Easy to use,take a deep breath and let the colored balls float,you can measure and record the maximum suction force. It also helps fight stress and anxiety. By taking a deep breath,you can also clarify your thoughts and eliminate the stress and anxiety caused by daily work and activities. Key Attributes Dimensions (Length x Width x Height) 10cm x 5cm x 2cm weight 0.05kg Stock Location Country of Origin Brand SUNSKY Shipment Information Weight per item 0.05 kg Dimensions per item (LWH) 10 x 5 x 2 cm Carton weight 0.92 kg Carton dimensions (LWH) 25 x 22 x 10 cm Pieces per carton 3 Stock location