Effective prevention of dust, hair, and impurities. Helps prolong the lifetime of pump and water fountain. Filter 3.0: This filter unit is compatible with PETKIT eversweet 2s, eversweet 3, eversweet 3 Pro, eversweet Solo, Solo SE, and Pure Drink cat and dog water fountains. Multi-layer filtration system: Enhanced filtration performance with dual filter components and a high-density micropore filter. Effectively removes pet hair and most impurities to ensure pets drink clean and fresh water. Attention: Soak the new filter in clean water for at least 10 minutes before use. Replace every 30 days under normal usage. (Actual replacement time may vary depending on usage and filter condition. The LED indicator will notify when replacement is needed.) Reset the device after replacing the filter. We recommend cleaning the water fountain and replacing the water once a week to protect the pump and maintain filter efficiency. Item model number: Filter Color: White Material: Plastic Package Contents: 5 x Water Fountain Filters 5 x Filter Cotton Note: Only the items listed above are included. Other products are not included. Note: Light reflection and differences in display screens may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.