Primo Cast Iron Firebox DividerITEM CAN BE DROP SHIPPED FOR ADDITIONAL SHIPPING CHARGE. cast iron firebox divider is a handy tool that allows you to cook using direct heat on one side of the grill, and indirect heat on the other side. This firebox divider is made for use with your Oval Primo Grill. Note: Product photo shows the cast iron divider as it is installed with the lower grate, which comes with your grill. Divider does not include grate. Two examples of how the divider can