Music City Metals 68502 Gloss Cast Iron Cooking Grid Replacement for Select Gas Grill Models by Ducane, Grill Chef and Others, Set of 2 Listing is for a 2-piece cooking grid set. 18 x 28.75 inch gloss cast iron cooking grid Fits Ducane 3100, 3200, 4100, Affinity 3073101, Affinity 3100, Affinity 31421001, Affinity 3200, Affinity 3300, Affinity 3400, Affinity 4100 Fits Ducane Affinity 4200, Affinity 4400; Grill Chef GC7550; Uniflame GBC850W, GBC850W-C, GBC850WNG-C