4 Inch HVAC Adapter
thingiverse
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...)
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