1.:MDH-0103JB Humidifier Wicking Filter Replacement Compatible with Mainstays MDH-0103JB Humidifier Wick Filters 2. : The MDH-0103JB Humidifier Wicking Filter effectively does a very good job of filtering out the hardness minerals in the water and preventing a white powder from entering the room air and depositing on everything in sight. Ensure long-lasting performance and maximize output for your humidifier 3. : The MDH-0103JB Humidifier Wicking Filter is built with top-notch materials. Made of multi-layer mesh humidifier cartridge and aluminum foil layer. High-quality PP absorbent reinforced mesh paper material, ing you a reliable solution for maintaining a comfortable indoor environment 4. : Package include 3 x MDH-0103JB Humidifier Wicking Filter . Easy to install, no tools required. We recommended replacement cycle of every 1-2 months.It depending on the air quality and circumstances Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.