Plastic cotton mesh: Filters out all the debris that may be in tap water, carefully retaining hair, sediment and dirt. Pet water dispenser cotton filter: The activated carbon in the filter eliminates unpleasant odors and peculiar smells, keeping the water clean and fresh. PET HEALTH: Helps filter drinking water to keep pets safe and healthy. Size: 8*4.5*1.5cm Please pay attention to choosing the right water fountain. Cat fountain filter: Replace every 60 days and clean the water fountain and filter every 2-4 weeks to keep the water fresh. Features 1) Pet water fountain cotton filter: The activated carbon in the filter eliminates odors and keeps clean and fresh water. 2. Plastic cotton mesh: Filters out debris that may be in tap water and carefully collects hair, sediment, and dirt. 3) Fountain filter: Replace it every 60 days and clean the water dispenser and filter every 2-4 weeks to keep the water fresh. Translated with DeepL.com (free version)