Solid shelves are a solution where dirt, dust and spills are a potential issue. The solid flat surface allows for storage from small to large items and the marine edge perimeter prevents spillage. The double hemmed steel gives the solid shelf excellent strength characteristics. All solid shelf units consist of 4 shelves and 4 posts. Additional shelves may be purchased separately. Mobilize starter shelving unit using optional mobile kit, WR-00 or WR-00H. Includes 4- 74" Posts and 4- 18" x 36" Solid Galvanized Steel Shelves