Filter Spirometry Astraguard Bacterial/ Viral Transparent 50/Pk. 99.9% Bacterial and viral efficiency. Low resistance to air flow. Small, non-threatening size. Comfortable oval mouthpiece. Reduces risk of cross-contamination.
These filters fit the SDI Astra 100, 200, 300, AstraTouch, and Astra BT Spirometers. They are also individually wrapped. They are available in quantities of 50, 100, and 300.
