Inogen One® G4® Replacement Column Pair 243 lb Capacity The DC power supply and JAZZY 1450 The DC power supply and your ARYA Airtivo portable oxygen concentrator is an essential combination for restoring independence and freedom into your everyday routine 34 in Ground Clearance 2 The removable columns for your Inogen One G4 machine contain sieve filters that remove inert gases from the room air around you and help concentrate it into medical grade oxygen *Please note: It is possible that your Inogen One G4 machine may require you to replace its columns earlier than you would normally expect due to the varying operating conditions under which the Inogen One G4 can function