Compatibility: Replacement filters are compatible with 3L (with filter), 3.6L, 4.6L, 6L, and 8L automatic pet waterers. Triple Filtration System: Features a 3-layer filtration system. High-density filter cotton traps pet hair and sediment. Activated carbon removes chlorine and odors while preserving beneficial minerals. Ion exchange resin reduces heavy metals. Ensure Health: Helps remove impurities, chlorine, and odors, softens hard water, and improves taste. Clean water may help reduce the risk of urinary tract issues in pets. Warm Tip: Filters are packaged in a thickened paper box. Before installation, rinse and soak the filter under running water. Replacement Frequency: For optimal performance, replace the filter every 30 to 45 days. More frequent changes may be needed for multi-pet households. Material: Carbon fiber Color: White Package Contents: 8 x Replacement Filters Note: The package includes only the items listed. Light reflection and display settings may cause slight color variations between the image and actual product. Measurement may vary by +/- 1-3 cm.