SureGard General Spirometry Filter
External Diameter (machine end): 32.5mm
Internal Diameter (machine end): 29mm
99.9999% Bacterial/Viral efficiency at realistic flow rates which removes all pollutants down to 0.027 micron. HyperGard® Electrostatic media. Inline Deadspace 50mls.
Patented unique Mouthpiece for better patient compliance. Easy to recognise color coding for multiple machine laboratories which reduces accidental wastage.