The heavy duty coal grate helps to keep the embers off of the bottom of the stove to prevent burnout, it also allows air to get under the fire to insure good combustion.
1"x 1/8" bar welded bar stock
Large coal grates measure 20" Long x 7.25" Wide - Large Fits Spruce, Timberline, and Alpine stove models.
Small coal grate measures 14" Long x 6" Wide and fit the Mesa stove model.
