This side panels attach to the outside of modular cages to create a privacy barrier between connected cages. Secure easily with included screws. Attaches using existing hardware from cage. Panels fit on the outside of the cage. Fit standard height individual modular cages or multi-tier cage kits. Includes 2 panels per pack. Available in black color. To attach side panels to cage: Loosen the two screws on the front and back walls of the cage (do one side at a time) that hold the side walls on. Loosen just enough to slide the panels between the walls. Align the slots in the panels to go over the screw body. Retighten screws. Measures 22-1/2-inch length by 20-inch width.