- Compatibility and size Fits most 84 oz / 2.5 L Square pet fountains on the market. Hollow circle diameter about 1.4 inches. Square housing length about 4.8 inches. Not compatible with 95 oz / 2.8 L fountains. - What you get Pack of 10 filters and 1 cleaning brush. Filters are individually sealed to maintain freshness. - Filtration system Triple filtration with cotton layer, activated carbon, and ion exchange resin. Effectively filters hair and debris, reduces heavy metals, keeps water fresh, and improves taste. - Health impact Helps pets increase water consumption by providing clean, appealing water. - Use scenarios 1) Regular replacement in homes with multiple pets using 84 oz square fountains to maintain water quality. 2) Ideal for households with several pets or small kennels to ensure clean water between cleanings. 3) Suitable for offices, pet care facilities, or clinics to provide consistently fresh water for pets.