Its simple and modern design, this 20 In x 20 In fireback accents the beauty of any fireplace. The fireplace fireback absorbs the heat and then radiate the heat directly into the room, making the fireplace more efficient in heating the house. Constructed of 14-ga., 304-alloy stainless steel, these Radiant Firebacks weigh about one sixth the weight of a cast-iron fireback. Its lightweight, and easy to install. Each fireback features a gentle curve applied to its back to pre-stresses it and minimize warping. This fireplace fireback has slotted support legs that allow you to adjust it to three angles: 65, 75 and 90 degrees. The legs are 1" high, 2 3/8" wide and 9" long.