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All CONTEC brand lung function products can use this mouthpiece.
Mouthpiece of CONTEC brand spirometer SP70B/SP80B/SP10/SP10W/SP100/SPM-D/RPM10
Mouthpiece of CONTEC brand spirometer SP70B/SP80B/SP10/SP10W/SP100/SPM-D/RPM10
Mouthpiece of CONTEC brand spirometer SP70B/SP80B/SP10/SP10W/SP100/SPM-D/RPM10
Mouthpiece of CONTEC brand spirometer SP70B/SP80B/SP10/SP10W/SP100/SPM-D/RPM10