Every cat crawler has the necessary parts for installation when it is purchased. The customer only needs to install it according to the product group diagram.<br>Product specification: base 27 cm * 43 cm (10.6inch * 17 inch), 286 cm (113 inch) long, adjustable, each layer height 55 cm(21.6inch) board thickness 1.5 cm, weight 10 kg<br>Product color: beige/blue photo and display will produce slight error<br>