Primo Grills Oval Firebox DividersSplit your lump charcoal for two zone cooking or run smaller, more efficient fires with this OEM Firebox Divider for Primo Oval ceramic grills. This heavy duty cast iron divider drops into the charcoal grate to split the firebox in half. Run a smaller fire for everyday cooks, or bank lump to one side for perfect direct indirect setups. Why Use a Firebox Divider? Two Zone Cooking: Keep lump on one side for direct heat while the opposite side runs