Box of 50 (Air spirometer not included).
Filtrette A Features
- Lower cost
- Unique one-piece filtered mouthpiece design provides optimal fit
- Prevents cross-contamination
- Provides 99.9% bacterial/viral filtering
- Ensures accurate test results
- Low resistance to airflow
- Meets ATS/ERS standards
- Comfortable oval mouthpiece
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The filter bodies with Technostat® filter media are tested for biocompatibility.*
*Testing performed by Nelson Laboratories
