The C140-2 double bay has a streight up front 18 inch shield, a 12 inch top shelf, and a 11 inch removable mid shelf in each bay. There are three different support styles which can be used in any combination for a mid shelf. This is a double bay unit using Deep Supports on both ends and a Closed Support in the center. This unit has 48 inch bays. A bay can be as small as 24 inches and as large as 84 inches. There are two standard shield heights (18 and 22 inches ) there are three standard top shelf depths (12, 18 and 22 inches). Custom heights and depths are available. This is a NSF certified configuration.