The Genie SideWalls gives owners the benefits of a hood for cats who don't care for deep cover. It provides a bit more privacy than the regular CatGenie and its higher sides at 4" keep high kickers' scatter inside the box. The sides are seamless additions that cleverly nest exactly onto the CatGenie Base and precisely match the base color of pearl gray. For use with the CatGenie 60-Original Litter Box or CatGenie 120 Litter Box, sold separately.