Compatibility: This cat fountain filter is compatible with the Catit PIXI 43717 automatic cat water fountains (blue/green/pink/white/stainless steel). Please check your fountain model before purchasing. Triple Filtration: Compatible with the Catit Pixi water fountain filter, this cat fountain filter consists of activated carbon, filter cotton, and cation exchange resin. It purifies your pet's water in three ways, with a high carbon content. The dense cotton mesh filters hair and dirt, the activated carbon removes odors, chlorine, and impurities, and the ion exchange resin filters heavy metals, resulting in better-tasting water. This way, pets can drink clean, fresh water all day long. The fountain filters provide cats and dogs with clean, flowing water, helping to increase water intake and reduce the risk of urinary tract infections. Pack of 12 Premium Pet Fountain Filters: This pack contains 12 Pixi cat fountain filters. This quantity is sufficient to meet your usage and replacement