This product is suitable for: HU4136/HU4706/ 01/ 02/ 03 etc. This product has: humidify the air, greatly improve the air purification ability of the ion group. Recommendations for ‘use : It is recommended to maintain it once a month. Rinse the filter surface 2-3 times with clean water. Do not force rinse. Packing list: 2* filter element We only sell filter cartridges, not other items in the picture. Due to the difference between different monitors, pictures may not reflect the actual color of the item. Due to manual measurement, please allow slight size errors.