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Model # 12-1710
nexpensive spirometer for screening large populations
Indicator registers forced vital lung capacity up to 7 liters
Use as an incentive exerciser for respiratory problems
Comes with 50 mouthpieces
12-1710 Features: -Inexpensive spirometer for screening large populations. -Subject blows into disposable mouthpiece. -Indicator registers forced vital lung capacity up to 7 liters. -Reading stays at maximum until reset. -Use as an incentive exerciser for respiratory problems. -Comes with 50 mouthpieces.