bbq factory Replacement Porcelain coated Cast Iron Cooking Grid/Cooking Grates JGX312 Set of 2 for Select Gas Grill Models By Master Forge SH3118B Gas Grill and Others Porcelain coated Cast iron cooking grids, Dimensions: 17 5/8" * 9 11/16" each, 17 5/8" * 19 3/8" Material: Porcelain coated Cast Iron Fits Master Forge SH3118B