LITTER BOX FILTERS - Odor control you can rely on: Activated carbon filters designed to absorb odors in the litter box, improving indoor air quality by reducing the familiar litter box smells. - Compatibility that fits your setup: Specifically designed for the Petmate Booda Dome Clean Step Cat Litter Box. The filters are pre-cut for direct installation. Due to their unique size, they are only compatible with the Petmate Dome Cat Litter Box as shipped; you can also cut them to fit a Petmate Basic Cat Box if needed. - Pack contents and usage life: Pack of 4 activated carbon filters. Each filter can be used for 2-3 months, depending on usage and conditions. Replace when effectiveness declines. - Material and construction: Fibrous activated carbon as the adsorption material, bonded to the fiber with a high-density polymer binder. Filter thickness is 0.5 cm (0.2 inches), designed to efficiently absorb odors. - Easy to install: Pre-cut for straightforward installation. Simply place in the designated area of the litter box after trimming if necessary for non-dome models. - Practical scenarios: - In a multi-cat household with a single litter box, these filters help reduce persistent odor and keep the room fresher. - In small apartments or rooms adjacent to living spaces, maintaining a cleaner air environment around the litter box. - During regular litter box maintenance, replacing filters every 2-3 months helps maintain odor control between cleanings. - Maintenance guidance: Replace the filter when odor control diminishes. The pack includes four filters to cover multiple maintenance cycles.