Lot of 10 Vitalograph Disposable SafeTway Mouthpiece One-Way Valve Tubes The low resistance SafeTway mouthpiece allows entry of expired air into the measuring system, but not back to the test subject. Fits most pulmonary function test equipment, including peak flow meters (An adaptor may be required). The filter allows exhaled air to enter it but not to exit back to the patient. This simple, yet effective patented design prevents concerns of accidental inhalation of pathogens. Note: Multi-Quantity are avail, pictures show one of the actual units, all are in similar conditions, Parts are hand marked and Serial Numbers Recorded to prevent fraud "The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. If so, do no.
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