Column Pair (Sieve Beds) for Inogen One G4 Oxygen Concentrators

This is a replacement Column Pair designed for use in all Inogen One G4 Portable Oxygen Concentrators. These removable metal columns contain the sieve beds used, by the InogenOne G4, to convert normal air into air with high oxygen concentration. Columns Pairs should be changed as needed — generally every 18-24 months.