Disposable mouthpieces. For use with Astra 300 and AstraTouch Spirometers
 
Single-Use Bacterial/Viral Filter that provides virtually perfect infection protection for expiratory and inspiratory spirometry testing. This easy-to-use disposable mouthpiece incorporates a highly efficient woven filter that virtually eliminates cross-contamination from patient to patient and from patient and to health care professionals.
 
Includes Single-Use Nose Clip for accurate testing.