1. Suitable models: Compatible with air purifiers. Applicable to the humidifier filters of air purifiers of models HU4801 and HU4803, and also suitable for models HU4811, HU4813, and HU4814 in the 2000 series. 2. It has relatively good water absorption and can contribute to a healthy air environment. 3. An advanced - type humidifying filter that can adsorb water scale. 4. Model: FY2401/30 5. Type: Humidifier component 6. Color: Black 7. Material: Filter cotton 8. Package contents: 2 humidifier filters 9. Only the above package contents are included, and other products are not included. 10. Notes: Due to light reflection and different displays, the color of the items in the picture may vary slightly from the actual product. The allowable size error is plus or minus 1 - 3 centimeters.