We humidifier filter, made of natural fabric, multi-layer mesh surface to maximize the output of humidifier moisture, also better filter Limescale, the new upgraded material makes the filter more stable and filtering, can be used for a time. and high quality Easy Installation,Remove the old filter in your humidifier, put this brand new humidifiers filters in place and adjust it well. Normal use 1-3 months need to be replaced with distilled water or cold water to fill the tank, not hot water. Made of high quality material, more durable. As part of normal maintenance, it can be removed and replaced Product Name:HWF100 Humidifier Filter Type:Filter Type:for HolmesHWF100-UC3/BionaireBWF100 :12PCS Colour:Black & White Material:plastic Size:135mmx190mmx30mm Package Contents: 12 * Humidifier Filter 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.