Kitty Kasas are cube-shaped cat houses that can be stacked into a custom Cat Condo design. Available in two Collections, (Standard Snap-On and Duro), Kitty Kasas Cubes are available in a variety of colors boast an ultra-durable design. Perfect for pet care professionals, vets, shelters and cat cafes! The Cat Recreation Cube from the Duro Collection is made from non-toxic, food grade HDPE, a material that is both durable and non-toxic! Each cube measures 15.25” x 12” x 16.5,” and can be used indoors or outdoors. It ships with four hanging cat toys to keep your kitty busy and entertained. The Duro Models are NOT compatible with The Standard Snap-On Line or Penthaus Bed accessory. Duros will stack, mix, match ONLY with other Duros! Each item in the Duro collection ships fully assembled, ready to use! Care is simple. All Kitty Kasas are extremely easy to clean—just wipe down with soap and water.