Keep logs up and away from the bottom of the firepit bowl to allow for proper air circulation and a larger flame. This 100% iron grate sits between the lip and bottom to ensure a well-ventilated fire.100% iron. Cover when not in use. Replacement grate for Copper Firepit . Not approved for direct cooking uses. Not for use on wood decks or other flammable surfaces. Frontgate Safety Recommendations. WARNING: Combustion byproducts produced when using this product include carbon monoxide and other chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov..