Direct Store DC143 Cast Iron Plate Setter for Large Big Green Egg Grill and Other 18" Diameter Cooking Grills, Kamado Grill, 18" Smoking Stone, Pizza Stone, Heat Deflector with 3 Legs, With 14" Cooking Surface. Dimensions: overall diameter 18", Grate diameter 14", height 2.5". which is a bit larger than the inner diameter of the common heat transfer plate on the market. The large area makes it convenient to cook more food at once. Pizza Grilling Stone with 3 legs construction is made of durable and high density cast iron. It has better bearing capacity and stability. The overall diameter of the heat deflector is 18", perfect for large big green egg or other 18" Kamado Grill. It also could work as a griddle, pizza stone and as an indirect heat tool (need flip it over).