Simulate level of resistance and lung compliance and provide consistent accuracy. Can be used prior to placing a breathing circuit on a patient to ensure patient safety. Can also be used for demonstration and training. Test Lung- 25 ml Test lung Volume- 25ml 15mm connector port as per ISO standard Flexible silicon bellow Test Lung- 50 ml Test lung Volume- 50ml 15mm connector port as per ISO standard Flexible silicon bellow Test Lung- 1000 ml Test lung Volume- 1000ml 15mm connector port as per ISO standard Nitrile Inner Rubber