SafeTway Mouthpieces are disposable mouthpieces with One Way Valve that allows entry of expired air into the measuring system but not back to the test subject. This simple yet effective patented design prevents concerns of accidental inhalation of pathogens. These low cost and low resistance mouthpieces that helps to prevent cross-infection and can be used with most peak flow meters and spirometers.
It has a 30mm diameter at both ends. It fits most pulmonary function test equipment, including peak flow meters. An adaptor may be required for some models not accepting 30mm diameter mouthpiece