Compatibility: ONLY Compatible with PETLIBRO Dockstream Cat Water Fountain PLWF105 / PLWF115 / PLWF005. If in doubt, please check product dimensions. Easy to Install and Clean: This filter for cat water fountain is easy to remove and replace, saving time during cleaning. Soak the pet fountain filter and sponge in water for at least 3 minutes before use to activate optimal filtration performance, then rinse thoroughly with running water. Helps keep water fresh for a longer period. Healthy Filter Ingredients: Triple circulation filtration system includes activated carbon, ion exchange resin, and non-woven fabric. Effectively filters impurities such as hair and heavy metals while improving water taste and quality. Premium replacement filters help keep pets healthy and hydrated by providing clean, fresh water daily. Premium 12-Pack Pet Fountain Filters: Includes 12 replacement filters and 12 pre-filter sponges, sealed to maintain quality. Provides a sufficient supply for 3 to 12 months of use. Replace the pre-filter sponge every 2–4 weeks. Filter Sponge & Pump Sponge: High-density pre-filter sponge captures fine impurities to enhance filtration efficiency. High-density pump sponge prevents debris from entering the water pump, helping extend pump life. Product Benefits: Removes impurities Color: As shown in photo Material: Cotton Package Contents: 12 x Replacement Filters, 12 x Pre-Filter Sponges Note: Light reflection and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.