1.Exquisite workmanship and high work efficiency. 2.washable, ensures noticeably better air, long-lasting suction performance, protects against pollen, dust and allergens 3.The humidifying filter can effectively filter particles, , dust, and the like. 4.Regular filter replacement: for optimal filtration and strong suction performance, regular filter replacement is recommended 5.RECOMMENDED REPLACEMENT: It is recommended that the filter be replaced every 4-6 months to optimal results. Filter name:Humidification filter Filter effect:remove impurities, calcium and magnesium ions in water, purify water quality, etc. Replacement cycle:6-12 months Applicable models:Suitable for Rain ERN1000/1080/1180 humidifier Colour:Blue Material:plastic Package Contents: 2 * Humidifying Filter 4 * Gasket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.