Marchioro Freecat Maxi Covered Cat Litter Pan with Filter and Odor Flap, Large (Colors Vary) Lid removes easily for cleaning High sides of litter box helps keep other smaller animals out Filters absorb odors and last 3-6 months depending on use of box Optional accessory is Tapix litter mat, Pala litter scoop and Sak litter bags Ships assorted in either Tan/Green or Tan/Blue; measures 27.5"L x 17"W x 17.75"H