The Machine Knob UI for Philip Respironics PR Machines is the small, round knob on top of the Philips Respironics PR System One CPAP and BiPAP Machines. This knob turns the machine on and off and is used in setting the machine.
PR System One 50 Series Knob
This item arrived as promised, and is an exact replacement for the original part.
Just had to remove metal clip from old on still on shaft
Great product, easy to get all of, came quickly. Service is better than that of my home health company
It fit perfectly and works fine.
perfect replacement part
I ordered a knob for my cpap. The right one was sent fast.