#251 Dimensions: Core Material: Copper Tank Material: Brass Row: 3 Height: 16-5/16 In. Width: 16-15/16 In. Thickness: 1-15/16 In. Inlet Header: 3-1/4 In. x 17-3/8 In. Outlet Header: 2-1/2 In. x 16-7/8 In. Inlet: 1-1/4 In. Outlet: 1-1/4 In. EOC: None TOC: 6 In. (Concentric)