Broan LT36 36N T Shape Hood Liner for PM250 and PM390, 36-Inch Especially designed to protect the exterior base of a custom hood Fits PM250 and PM390 inserts; CRS Painted silver finish Works with wood hoods that are integrated to the adjacent 12-Inch deep cabinets 24 gauge Fits custom hood nominal widths: 30-Inch and 36-Inch Durable silver painted finish and a 4-Inch depth for good capture