Compatible: Our replacement filters are compatible with FOR PETLIBRO Dockstream Cat Fountain PLWF005/PLWF115/PLWF105 for a perfect fit and optimal performance. Ensure your pet enjoys the best drinking experience. Triple Filtration: The pet fountain filter includes activated carbon, ion exchange resin, and non-woven fabric to reduce odors, remove heavy metals, and soften water. Pre-filter sponge: High-density sponge traps debris and pet hair, helping prevent pump clogging and damage, and extends the life of your fountain pump. Warm Tips: Immerse the filter in water for 2 minutes and rinse thoroughly before use to prevent carbon particles from entering the water and ensure clean, fresh water for your pet. Regular replacement: To maintain effective filtration, replace the filter every 2–4 weeks. For households with multiple pets, consider more frequent replacements. Material: Non-woven fabric Color: As shown Package Contents: 12 x Filter elements 12 x Sponge filters Only the above items are included; other products are not included. Note: Due to light reflection and differences in display screens, the color in the image may vary slightly from the actual item. Measurement error is permitted within +/- 1–3 cm.