Easy to assemble, no tools required, just peel the 3M industrial adhesive strips and put together with easy-align pins Made with eco-friendly and sustainable zBoard, non-toxic and free of formaldehyde and VOC Has two doors that are easy to open; Maximum weight capacity 30 lb (recommended) Fits litter box up to 19.3 x 18.5 x 14.5-Inch , Fits one regular sized scratchpad, Cat scratch pad included