O2 Hose Management

I designed this in OpenSCAD a few years ago and I've found it useful for keeping my O2 hose from under my chair as I roll it around my 3D printers. Very simple to print when laid on its side; there's no need for support. I never found it necessary to add a screw tightener, since if I forget about it and walk away it falls off and doesn't damage either itself or the table.