Shelf for Ferret and Critter Nation Rearrange your pet's home with additional shelves. Add levels to provide extra floor space. This shelf is made of solid plastic and will protect your pet's feet. This item is designed to fit all Ferret Nation and Critter Nation cages Features: Height adjustable, add anywhere in your Ferret or Critter Nation Great shelf for animals that make a mess outside the litterbox. Solid design makes clean up easier than with wire shelves Can easily be removed and reconfigured Item Specifications: Size: 23"L x 17.75"W x 3.25"H