Arm & Hammer™ Universal Litter Box Filters for hooded cat litter pans help reduce and absorb unwanted odors in your litter box area for up to 90 days. Arm & Hammer Universal Filters are double the odor and moisture protection combining Natural Charcoal and Zeolite particles to trap airborne odor molecules. Absorbs odors and keeps air clean while being nontoxic and easy to load. The filter is designed to fit both Large and Jumbo Hooded Litter pans. Filters are only designed for hooded cat litter pans and not for non-hooded litter boxes. 

INSTRUCTIONS: Remove the used filter and insert the new universal filter into the existing filter compartment of a hooded litter box.