1.Exquisite workmanship and high work efficiency.2.washable, ensures noticeably better air, long-lasting suction performance, protects against pollen, dust and allergens3.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 recommended5.RECOMMENDED REPLACEMENT: It is recommended that the filter be replaced every 4-6 months to optimal results.Filter name:Humidification filterFilter effect:remove impurities, calcium and magnesium ions in water, purify water quality, etc.Replacement cycle:6-12 monthsApplicable models:Suitable for Rain ERN1000/1080/1180 humidifierColour:BlueMaterial:plasticPackage Contents:2 * Humidifying Filter4 * GasketOnly 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.