6 Pack: Each filter set include 6 pieces of carbon and ion exchange resin filters. Mewdgland is the only official designated online store for the No spill dog water Bowl.The dog water bowl is not included. Double Filtration: The filter capture debris and remove heavy metals and odors from tap water. So your pet will drink clean water. Using Tips: We advise to rinse the filter 3-5 minutes thoroughly with drinkable water before use! Replace Cycle: This dog water bowl filters is easy to install, remove and replace. And we advise you to replace the filter 3-4 weeks to keep the water clean. Quality:Mewdgland is the only official designated online store for the dog water bowl dispenser, please get the authentic filters here. Pet Water Bowl