The ndd Medical EasyOne Filter FT (#2091-422) is specially designed for use with the FlowTube mouthpiece only
It helps ensure highly accurate test measurements and keeps the ambient environment clean while the ndd mouthpiece protects from cross-contamination
Meets the 2019 ATS/ERS spirometry standards for accuracy
Bacterial Filtration Efficiency (BFE): 99.99%
Viral Filtration Efficiency 99.99%
