For use with Inogen One models G1, G2 & G3, these are Output Filters for Inogen Portable Concentrator.  Each package contains 10 filters.

The output filters are located behind the cannula nozzle fitting, they are simple to remove and replace.  Output filters should be replaced at least once a year. 

More Information on Inogen One Output Filter for G1, G2 & G3 (10 Pack)