Peak Flow Meter Replacement Mouthpieces Pk Of 15 
The original portable Peak Flow Meter and the standard used by the majority of healthcare professionals. Individually calibrated to ensure high levels of Inter and Intra device accuracy. Integral one-way valve to reduce the risk of cross infection. Medical-grade construction. EU (EN 13826) Scale, 60-800. Replacement Plastic Mouthpieces Pack of 15.