Porcelain Cast Iron Cooking Grid for Grill Chef GC7550, Affinity 4100, 4100, Affinity 4200, Affinity 4400 and Uniflame GBC850W Gas Grill Models, Set of 2 Fits Ducane Models: 3200, 3073101, 31421001, Afinity 3200, Affinity 3300, Affinity 3400, Affinity 4100, 4100, Affinity 4200, Affinity 4400 Fits Grill Chef Models: GC7550 Fits Uniflame Models: GBC850W, GBC850W-C, GBC850WNG-C, NSG3902B, NSG3902D Compatible Part Numbers: 55-08-167, 5508167, 30501009, 68502, We Highly Recommend That You Measure The Size Of Your Original Parts and Compare Them To What We Have Listed Before Your Order Dimensions : 18"x 14-3/8" Each, 18"x 28-3/4" Total Material : Porcelian Cast Iron