Hook for electric heater

I designed this hook to put an electric heater into my car in the winter. Because it is an Piaggio Ape and has not such a great heting itself...
It can hang to the knob of the vent opening in the roof (I think it is special in my car, usually found in boats). But it is designed to hold on many other things, like mirror, sunblinds, handles or something, you will find your way.

Printed in PLA, supports recommended