Thank you for viewing. This is a set of 5 GEX Pure Crystal Softening Filters for cats. I accidentally purchased the cat version instead of the dog version. The filters inside are individually wrapped, so they are hygienic. I have opened the package, but of course, they are new and unused. These filters are ideal for maintaining the health of the lower urinary tract. - Brand: GEX - Product Name: Pure Crystal Softening Filter - Quantity: 5 filters - Purpose: Maintaining lower urinary tract health - Filter Type: Dedicated filter - Condition: Unused The item will be shipped compactly, with only the contents included. Please understand that this item has been stored at home. Thank you for your consideration.