- Square fountain filters compatible with various 2.5L square water fountains including Barvest and other models of the same size. Size: 4.92 x 4.92 inches. - Each filter is composed of ion exchange resin, activated carbon, and cotton mesh to effectively filter sediments, remove bad odors, and soften tap water. - Pack of 8 replacement filters. Replace every 12 weeks for optimal performance. In households with multiple pets, more frequent replacement may be necessary. - To minimize activated carbon dust dispersion (harmless to pets), soak the filter in water for 2 minutes and rinse thoroughly under running water before use. - These filters help capture pet hair, heavy metals, chlorine, and other impurities, improving water taste and clarity. - High-quality materials include premium activated carbon, ion exchange resin, and fine cotton mesh for reliable filtration. - Product details: 8-pack set. Compatible with various 2.5L square fountains of the same dimensions. - Ion exchange resin softens water. Activated carbon reduces odors and chlorine. Cotton mesh traps debris, hair, and particles. - Tips: Soak filter in water for 2 minutes and rinse thoroughly before first use. - Replace filters every 12 weeks in summer and every 24 weeks in winter, depending on usage frequency. - Color: White. Material: Activated carbon, ion exchange resin, cotton mesh. - Package includes: 8 x Square Filters. Other products not included. - Note: Lighting and screen settings may cause slight color variations. Measurement error allowed: +/- 13 cm.