Marchioro Bill 1F Covered Cat Litter Pan with Filter, Small/Medium, Slate/Ruby Door helps keep odors inside Filters absorb odors Lid unsnaps for easy cleaning Optional accessory is set of 4 rubber feet, Tapix litter mat, Pala litter scoop and Sak litter bags Measures 19.75"L x 15.75"W x 16.5"H