Secondary air filter for the Eternal O2 5LPM Personal Oxygen System.
For use with only the Eternal O2 unit
Two Secondary Black Filters for the back of the Eternal O2 5LPM Oxygen Unit.
Simply unscrew round filter at the bottom under the primary filter, remove old round filter and replace with the new filter when worn.
|Dimensions||8 × 6 × 2 in|