Round Perforated Grid For Extra Large and Large Eggs. Measures 16" Round.If you"re using the Large or XL EGG® to cook fish or small foods like mushrooms, shrimp or scallops that might fall through the regular cooking grid, use the 16-inch round fish grid to enjoy all the benefits of the EGG without being concerned about food falling into the coals. It is made of porcelain coated steel and has perforations to ensure the heat and flavor reach the food. Part # 16PH