The Trim Flange unit fits into the rough opening to provide a clean finished look on the interior wall. Trim flanges are available for use with standard masonry flood vents (1540-533) and Wood Wall Models (4” depth 1540-573 and 9” depth 1540-573-9) come standard in white.
The stainless steel sleeve lining is available in a 7 inch sleeve that can expand up to 12 inches (1540-531-12), and a 10 inch sleeve that can expand up to 15 inches.
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Admittedly, I tried to be cheap and didn’t purchase this on the front end. It looked terrible. Christian was a great help! The install of the entire assembly was a tough job but only because I had to cut through cement. Otherwise it would have been a simple installation. Regardless of gender, if you are handy then you can DIY. Install tips: use a level & trace an outline of the vent. Use a drill bit that exceeds the wall depth. Drill holes in all 4 corners and make sure your bit makes it through both sides of the wall. From there, cut away!