These replacement columns are ONLY compatible with Inogen One G3 systems with a FLOW SETTING range between 1-5. If your flow setting can be adjusted to Setting 5, this option is for you. Two columns are included in each order. So if you place one order, you will receive two columns. 

• The removable metal columns provide a quick and easy way to service your Inogen One G3 without having to send in the product for repair. Sold and used as a pair, the columns contain the sieve beds that convert normal air with lower levels of oxygen concentration to supply a high concentration of oxygen. These sieve beds wear down after prolonged use.
• The life of the (sieve) columns is guided by the “replace columns” alarm and is typically within a year.  In certain operating conditions, earlier replacement may be required. The Inogen One G3 will let you know when it is time for a replacement.
• Clear step-by-step instructions enable you to easily switch out the column pair without tools – without having to send the Inogen One G3 in for repair like you would with other portable concentrators!