We humidifier filter is made of high-quality material for durability. It features a multi-layer mesh surface to maximize humidifier moisture output and effectively filter limescale. The upgraded design ensures stable and efficient performance. Ideal for regular maintenance, this filter is easy to installsimply remove the old filter and replace it with the new one. Recommended replacement every 1-3 months with normal use. Use only distilled or cold water in the humidifier tank; do not use hot water. Product Name: HWF100 Humidifier Filter Type: Filter Compatible Models: Holmes HWF100-UC3, Bionaire BWF100 Quantity: 10PCS Color: Black & White Material: Plastic Size: 135mm x 190mm x 30mm Package Contents: 10 x Humidifier Filter Note: Light reflection and display differences may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3cm. Only the items listed above are included; other products are not part of the package.