The three piece metal outer frame is used to transition from your firebox to any adjoining surface including a wooden mantel, tile, stone or any non-combustible material. This steel frame is Stainless Steel to coordinate with any of your added adornment to your firebox.
The secondary picture shows the Breckenridge firebox with black outer frame. It also showcases the banded brick liner, Sassafras log set and lighting kit.
The arrow points to the Matte Black Outer Frame. This frame is for use with the Breckenridge Deluxe 36 Firebox.