$3.50 SGD
The Practi-man Advance lung is semi-disposable, and can be used to train a group of people in a session without needing to change it.
If the chest stops rising during the practice session, check that the lung is not moist.
If it is, replace it with a new one.
Find out more about the Practi-Man Advance CPR Manikin
User Manual
Practi-Man CPR Manikins