12 Packs premium charcoal water filter compatible with Veken 84Oz/2.5L Dog & Cat water founatins. Compatible models: Veken 84Oz/2.5L Dog & Cat Water Filters. Food grade activated carbon water filter removes bad tastes and odors from water, keeping it fresh; Ion exchange resins remove harmful contaminants from liquids, replacing them with beneficial, desired ions. Suggest to change the filter every 2-4 weeks to maintain water freshness. Nispira branded filters contain 50% more carbon than generic brands for better and longer-lasting filtration. 100% customer satisfaction guaranteed. Quality meets or exceeds leading national brand