The Nestor cat box from Savic is a modernly designed cat box that is easy to clean. Prevents sand from getting outside the box.The litter box has a higher tray and a roof to prevent spillage of cat litter. Two-color top with a clever design, the two-piece door means you don't have to remove the roof for cleaning.The box has a clever compartment in the roof for a carbon filter, this helps to prevent the spread of odors in the room. The filter should be replaced about once every two months.Facts about Savic Nestor Cat Box:Length: 56 cm.Width: 39 cm.Height: 38.5 cm.Door entrance: 21x20 cm.1 carbon filter included.