✅The pack contains 2 different size balls. 1x Average Lung (Medium size) and 1x Low Lung (Small size).

✅Balls are used as replacement or spares for convenient continued use and, for those that wish to adjust the resistance of their AirPhysio device.

✅Why purchase additional resistant ball bearings for your AirPhysio device?
1) Some people accidentally misplace the ball that comes inside the AirPhysio device and need an additional ball as a replacement part, instead of purchasing an entirely new device.
2) Some people like to use a different resistance for their lung training and or mucus clearance.
⚠️Note:
✅ The AirPhysio Children/ Low Lung Device contains a Small size ball as standard.
✅The AirPhysio Average Lung Device contains a Medium size ball as standard.
✅The AirPhysio Sports device contains a Large size ball as standard.