A kit comprising four lung bags with holders. Used for investigation of lung capacity. The bag is made up of durable plastic and is silk screened with graduations up to six litres in increment of 1/10th litre i.e 100ml. Useful for comparing lung volume with height, age etc.
Contains 4 durable calibrated plastic bags, 4 mouth pieces, and 4 rubber bands. Supplied with manual.
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