The Inogen One G3 Replacement Column Pair serves as the quickest and most efficient way for you to service your Inogen One G3 System without having to send it in for repair. The replacement makes it easy for you to switch out the column pair without the need for tools. Warranty: 1 Year Limited - Free from Defects in Materials and Workmanship under Normal Use and Service. Note: This product only ships to addresses in the US. Sold as a pair, the columns contain the sieve beds that convert normal air with lower levels of oxygen concentration to medical grade oxygen. Unfortunately, the sieve beds wear down after periods of prolonged use, hence the need for replacements. Inogen recommends replacing your columns approximately every 18 months, though certain operating conditions may necessitate earlier replacement. Literature Inogen One G3 Replacement Column Pair Literature Inogen One G3 Column Change Guide
