Leave the wrapper of the ndd Spirette wrapped around the mouthpiece (see image) to insert the Spirette into your Easy on-PC. Then, with the wrapper still in place, attach the EasyOne Filter SP to the Spirette. Ensure that the Spirette and the EasyOne Filter SPare fully inserted. The EasyOne Filter SP is to be used only with the Easy on-PC. You can watch the instructional video here.
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