Each set includes 36 filter for long term use, recommended to be replaced monthly Saves you money while maintaining optimal water without frequent repurchasing hassles Designed to fit most brands and models of and dog water fountains, these replacement filter offers seamless installation Not need to worry about mismatched sizes or complicated setups for your pet ' s water dispenser This carbon filter replacement set effectively removes odors, impurities and harmful substances from water using activated Provides freshness, purified drinking water for your cats and dogs to ensures their health and hydrations Simply remove the old filter and insert, not tools required The user friendly design makes maintenance effortless, keeping your pet ' s water fountain clean and functional at all times Made from food grade materials without harmful Ensures complete safe for your pets while promoting sustainable consumption with recyclable components