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For use in hospitals, doctor's offices and at home. The Vitalograph® Peak Flow Meter is delivered with individual athma daily record chart and coloured "traffic lights" scale for self control. Suitable for multi-subject use with SafeTway mouthpiece no. VTG 20242 and no. 28554. Measuring range: 50 - 800 l/min. Dimensions: 150 x 60 x 34 mm.