Dryer Vent Flap

I noticed my dryer vent flap cover was warped to the point where it would not close at all- letting in cold air, insects, rodents, etc. I quickly modeled it up and Voila- good as new. Maximum clothes dryer temp is right around the start of the glass transition temp for PETG, so it should be fine. If the heat is too much it may be better printed in ABS.