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 (1540-531-112), and a 10 inch sleeve that can expand up to 15 inches.
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