Petmate Cleanstep Filters 2 PACK Quality Material used for your pet's best health Designed in the USA with high standards set Trusted for decades in the pet industry and setting new standards Reduces litter box odor Easy to use and non toxic lasts up to 6 months Large capacity filter makes the litter box 99% odor free 2 filters to a pack Reduces litter box odor Easy to use and non toxic lasts up to 6 months Large capacity filter makes the litter box 99% odor free 2 filters to a pack