Lung Volume Bag Set
For determining maximum lung volume (vital capacity). Student exhales fully into a bag, then squeezes the expired gas into the bottom of the bag. Vital capacity is read directly from wall of the bag (marked in 100-mL increments up to 6 L). Set (item #692645) includes 4 heavy-gauge plastic reusable bags with mouthpiece holders and 30 disposable mouthpieces. Mouthpiece Replacements (item #692647) and Lung Volume Bag Replacements (item #692648) are available.