Simple hook for flat bathroom radiator

I could only find models for the round type for radiator so I designed this one for mine.
It needs to be slided in from the side of the radiator “bars”. (The bars are exactly 38.33mm on mine).

To be printed in PETG or ABS. I turned off the heater here so I still need to test it while it's on but I reckon it will be fine in PETG.