Check the listing for details. Replacement Carbon Filter for the Simply Clean Litter Box. Condition: New. Listed at 12.95 USD. Keep your cat's litter box clean and odor-free with this replacement carbon filter specially designed for the PetSafe Simply Clean Self-Cleaning Litter Box. The filter effectively traps and eliminates odor-causing bacteria and can last up to 2-3 months. Made for convenience, this filter is easy to install and maintain. It fits perfectly into the designated slot of the litter box, ensuring proper filtration and a fresher environment for your feline friend. Get your replacement filter now and provide your cat with a clean and healthy place to do their business. Compatible Litter Box – The filters are compatible with the newest, gray version of the PetSafe® Simply Clean® Automatic Litter Box Easy-to-Fit – Simply slide the filter into the slots inside the cover and replace over the waste area Reduced Odor – Dual-action carbon pad traps odors to keep your cat’s litter box smelling fresh Long-Lasting Filter – Each filter can last up to four weeks