Music City Metals 53083 Stamped Porcelain Steel Cooking Grid Replacement for Gas Grill Model Master Forge P3018, Set of 3 Listing is for a 3-piece cooking grid set. 17.8125 x 29.25 inch stamped porcelain steel cooking grid Fits Ducane 4100, Affinity 31421001, Affinity 4100, Affinity 4200; Master Forge MFA550CBP, P3018