Effective prevention of dust, hair, and impurities. Helps prolong the lifetime of the pump and water fountain. Filter 3.0: 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. Features dual filter components and a high-density micropore filter to remove pet hair and most other impurities, ensuring clean and fresh water for your pets. Attention: Soak the new filter in clean water for at least 10 minutes before first use. Replace every 30 days under normal usage. Actual replacement frequency may vary depending on usage and filter condition; the LED indicator will notify you when replacement is needed. Reset the device after replacing the filter. We recommend cleaning the water fountain and refreshing the water weekly to maintain optimal pump and filter performance. Item model number: Filter Color: White Material: Plastic Package Contents: 5 × Water Fountain Filters 5 × Filter Cotton Note: Color appearance may vary slightly due to lighting and screen differences. Measurement tolerance: ±1–3 cm.