Arm & Hammer Hooded Pan Filter Universal Arm & Hammer Litter Box Filter absorbs moisture and odors from feces and urine. Lasts up to 90 days. Double the odor & moisture protection combining natural charcoal & zeolite. Filter designed to fit both large & jumbo litter pans This Product/Package Measures: 6.30 in. L x5.50 in W x0.50 in D