Features: Made of AAA environmental protection building blocks, non-toxic, solid and durable. Anti-skid design to prevent accidental falls of your small pet. It can be a playing swing and also provides your pet with a nice and cozy place exercise and rest. With hooks, easy to install in the cage. It's safe your pet. Utilize the corner space, very practical, easy to and resistant to odors. Specification: Material: AAA environmental protection building blocks Color: As picture shown Size: Approx. 13x9x7 cm/ 5.12x3.54x2.76 inch Packing List: 1 x Stainless Steel Chain 1 x Wooden Board