Welcome to PVC Cages                                                 |     home                                                    4 Tub Ball rack All racks are made out of  3/8  PVC  3" Flexwatt  recessed for belly heat. Tub size is 41 qt   34.5 x 16.5 x 5.5     I am offering a 3 shelf or a 4 shelf   disassembled shipped rack. Flexwatt comes Prewired but you need to install it. Tubs can be purchased at your local Walmart or Meijers. They are  Sterilite # 1960