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Spirotube, Type A, Disposable Mouthpieces, 500/case
" Disposable mouthpieces for use with the following units: \n \n MicroLab 3300 \n Riko Spiromate, AS-300 \n Spirometrics Flow Mate, Spiroplus, SMI I, SMI II, SMI III \n MIR Spirometers \n \n Diameter: 1 and 3/16\" Note: These mouthpieces do not fit on the Pulmoguard and Pulmogard II fil
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