Inogen One G4 Replacement Column Pair - Oxygen Accessories - Two Removable Metal Columns - 0.63 lb., 2.21 in. W x 2.37 in. L x 5.50 in. H

Patient Replacement: These removable metal columns allow for at-home servicing of your Inogen One G4. Regular Maintenance: Inogen recommends replacing the columns approximately every 12 months. User Alerts: The Inogen One G4 device will notify you when it's time to replace the columns, ensuring optimal performance. Tool-Free Operation: The column replacement process is designed to be straightforward, requiring no tools, making it accessible for all users.