This trim kit fits the perimeter of the firebox after installation of firebox. It features a curved design and is available in a black finish. The trim is 3" wide and is for use with CDV36, BDV400, HBDV400, GCUF32C, GRUF32C, DFS32C, LCUF32-R. The installation of a trim kit adds a finished look to your fireplace. Must be used with wood surround installations.