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QRS Pre Calibrated Mouthpiece (100 Box) Warranty_6 Years 2 inch dual wheel HTN 18320000 2 inch dual wheel Zoll Sidestream Airway Adapter Kit Specifications: The QRS mouthpiece reduces the liability for cross contamination and eliminates the need for sterilization The QRS Pre Calibrated Mouthpiece (#Z 5000 2608 100 per Box) is disposable and calibrated during production using the same equipment LDS hospital uses to validate spirometers against the American Thoracic Society's recommendations for the standardization of spirometry
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