Primo Cast Iron Firebox Divider For Primo Oval Large 300 Grills - PG00344Primo Firebox Divider For Primo Large 300 Grill Key Features Divide your Primo grill for direct and indirect cooking. Allows for different temperatures on each side of your firebox divider. Designed for Primo Oval Large 300 Grills. Unlock the full potential of your Primo Oval Large 300 Grill with the innovative Primo Firebox Divider. This clever accessory divides your grill's firebox, enabling you to cook with direct heat on one side and indirect heat