Replacement knob for Respironics System One CPAP machine

You could buy a genuine OEM replacement knob for $5 plus shipping and handling and wait for a week for it to be delivered. Or you could print one right now for a couple of cents. That expensive 3D printer is going to pay for itself in no time. Just need to break a couple hundred more CPAP machines.

Print instructions

I created two pre-sliced versions of this model. The main one prints in a single solid color. The one in the user files section adds a decorative stripe. This requires two differently colored filaments to be loaded in extruder #1 and #2.

I printed in PETG, but I don't think this part has any critical components. You could just as well print it in any other material.