CATIT SENSES 2.0 CAT WATER FOUNTAIN FILTERS, CAT WATER FOUNTAIN, 5 PACK · Set of 5 filters compatible with the Catit Flower Fountain, Catit LED Flower Fountain and Catit Stainless Steel Drinking Fountain · Helps reduce the risk of urinary tract infections; important for cat health · Cat fountain filter has active carbon removes odors and impurities · Ion exchange resin softens hard tap water; this helps keep both the water and cat flower fountain clean · The cat water fountain filter is made out of mesh that assists in filtering out large particles and debris