The model is part of the ventilation window of the caravan. I recommend using UV resistant material. The original part cracked due to the sun.
I used 4 perimeters and 30 infill + raft (i recommend for ABS)
This is right variant, use mirroring for the left variant
I used a support under the hemisphere, but it was probably not necessary.
Let him serve
Radek
The author marked this model as their own original creation.