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ndd Medical Flow Tube Adapters (#2030-21 / 50 per bag) are single-patient use and have been specially designed for calibration and use with the EasyOne Air Spirometer.
Note: The image on this product page is for instructional purposes. To add a filter (2) to the EasyOne Air, insert the FlowTube normally. Then attach the (1) filter adapter (FT), to the back of the FlowTube and connect the filter to the filter adapter (FT), as shown in the diagram.