"Three piece" porcelain enameled cast iron cooking grate set. Each piece measures 18-7/8" front to back X 13-7/16" wide, for a total set width of 40-5/16". IMPORTANT: The width measurements include the outside edge rail "lug/tab" extensions. These grates are reversible, on one side the front to back rails are "peaked", great for searing, and on the other side the rails are flat. Fits the Weber Genesis "II" 610 Series and many other brands/models. Genuine Weber Part