Inogen Rove 4 Replacement Columns Graham Field Tourniquet Velcro strips on underside -

Velcro strips on underside - not visible while in use

The oxygen cylinder allows users to carry oxygen on the go in order to maintain an active lifestyle

Invacare HomeFill M6 Post Valve Cylinder

AirFit N20 Mask Features

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Inogen Rove 4 Replacement Columns Graham Field Tourniquet Velcro strips on underside -About the Inogen Rove 4 Columns The Inogen Rove 4 Replacement Column Pair ensures your portable oxygen concentrator delivers high purity oxygen by filtering nitrogen from the air. When the columns need replacing, the device's LCD screen will display a "O2 Service Soon" alert. These easy to install sieve beds require no tools and should be replaced every 12 to 18 months for optimal performance. Each set includes two columns and is compatible only with