This metal vent is sturdy and solidly constructed. It doesn't rattle and the damper stays put. What makes this a 5-star product for me is that when the damper is closed, it's nearly air-tight. (I also bought the Truaire 12x6 C103M for comparison, and it is noticeably not air-tight.) Note: when I bought this, it was branded as American Metal Products, not Hart & Cooley; not sure if that matters.