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Vitalograph SafeTway One-way Mouthpieces (Box of 200)
" SafeTway One-Way Mouthpieces for Vitalograph Spirometers. Come in a box of 200. \n These are disposable mouthpieces with One Way Valve that allows entry of expired air into the measuring system but not back to the test subject. This simple yet effective patented design prevents concerns of ac...
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