Petmate charcoal filters for the Clean Step litter dome with filter cover. Two filters per package.
Reduces litter odor for up to 90 days!Safe, natural, and non-toxic! Installation and care of charcoal filters:Remove a filter from the bag. Remove the clean step litter dome cover and place it upside down. Open the louvered filter cover, insert one filter, and snap it closed. For best results, replace the filter every 90 days. Do not wash or wet filters.