This is a box of 200 Flowtubes for the Ndd Air Spirometer, a dispenser pack that holds 50 is included. These tubes will not fit any other Ndd Spirometer except the AIR Model. If you need spirettes, please don't order these FlowTubes. They look similar to spirettes, but they are a different shape.
NDD has a Minimum Adertised Price for their products
