The USEAMIE 10 Pack Cat Litter Box Charcoal Filters Replacement Carbon Odor Filters 6Inch x 6.5Inch Hooded Cat Litter Boxes and Pans are designed to help reduce odor in your home. With activated carbon filters, these boxes can effectively absorb odors, improving the air quality in your home. They are easy to install and come in a pack of 10.