Product review (3 stars): Good Item but Needs Better Flap Seal
I would have given this 5 stars however.... My item box was already opened (almost like it had been previously returned and resold) and if using this as a range duct to the outside the manufacturer could have done a better job weather proofing it. The inner flap has a seal at the bottom but not on the other 3 sides. I personally do not want bugs finding their way in through the gaps of the unsealed sides and I wanted this to be air tight when the range hood fan is off. I had to buy 3/16 weatherstrip, take the screen out and add the weatherstrip to the unsealed sides. Now I do not have to worry about bugs getting in or loosing heat through the vent in the winter. Also won't have cold air blowing in through it in the winter. Aside from that the construction is good and the instructions that came with it are pretty easy to understand.