Pinit Please log in to see price or purchase this item Quantity discounts available QuantityPrice SKU: 11840 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. Item Description Filter Spirometry Astraguard Bacterial/ Viral Transparent 50/Pk. 99.9% Bacterial and viral efficiency. Low resistance to air flow. Small, non-threaten... Item DescriptionBackItem DescriptionFilter 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.