Petmate Clean Step Litter Dome LITTER-CLING STEPS: Grooved, clean-step entrance gently wipes cats' paws as they exit the cat box to keep floors litter-free ODOR-ELIMINATING FILTER: Featuring a charcoal litter box filter that absorbs odors, the kitty litter box can be placed in any room of the home; replacement filters available for purchase separately PROMOTES PRIVACY, CONCEALS LITTER: Petmate's cat litter box with lid encloses cats on all sides, ensuring privacy while keeping litter hidden from view ATTRACTIVE COLORS &amp; DESIGN: With a modern circular design in three fun colors, this covered litter box offers an attractive alternative to standard litter boxes; cat litter boxes available in "Pearl White"; "Brushed Nickel"; "Titanium" 50% LARGER THAN STANDARD LITTER BOXES: Measuring 21 by 21 inches, this large litter box comfortably accommodates multi-cat households and large cat breeds CONVENIENT CLEANING: Hooded litter box features a rounded pan with no stubborn angles to clean and a hard plastic tray that resists caked-on mess LITTER LINER-COMPATIBLE: Cleaning this enclosed litter box is even more effortless with Petmate's Litter Dome Liners; 12-pack available for purchase separately