4 Inch HVAC Adapter

Made this in Tinkercad to use as an adapter for an HVAC duct backdraft blocker (so bugs/smoke etc. won't come back in the tube) to couple with the window exhaust kit I made out of wood and the other end to the dryer tube in a custom laser engraver exhaust system with fan.
It is made for a 4" tube but the outer diameter of the collar is 99mm instead of 102mm so it can slip inside the backdraft blocker and be clamped down.

30% infill
0.28 layer height
I printed in PETG @ 75 bed / 243 end (my ender3 is weird and it likes it better for some reason...)