Features: 1Widely Compatible: This air humidifier filter is fit for HU4905 4906 4908 FY3436 is a perfect accessory for humidifier. 2Eco Friendly Material: Made of paper material safe environmentally friendly and durable so you can use it with confidence. 3Effectively Filter Impurities: This humidifier filter can effectively filter impurities and maximize moisture output. 4Replacement Frequency: According to the frequency of use it is recommended to replace it every 23 months to ensure that the machine runs in the best condition. 5Widely Application: The air humidifier filter is easy to install and replace widely used in bedroom living room office etc. Specification: Item Type: Air Humidifier FilterMaterial: PaperFitment: Fit for HU4905 4906 4908 FY3436Weight: Approx. 160g / 5.6oz Package List: 2 x HumidifierFilter