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.