Maintain accurate and hygienic spirometry testing with QRS Orbit Spirometer Mouthpieces. These disposable mouthpieces are individually wrapped and pre-calibrated for reliable results. Each mouthpiece is meticulously calibrated during manufacturing using the same high-precision equipment employed by LDS Hospital to ensure adherence to American Thoracic Society's spirometry standardization guidelines. Designed for single-patient use, these mouthpieces promote infection control and user safety.