[PERFRCT COMPATIBILITY]: 1043 super wick humidifier filters perfect for Essick Air 1043 Humidifier EP9500, EP9700, EP9800, EP9R500, EP9R700, EP9R800, 821000, 821001, 826000, 826800, 831000, SS390DWHT. 800 8000 Evaporative water wick series air humidifier. Compared to Part # 1043. [EFFICIENT FILTRATION]: 1043 Humidifier wick filter can better filtere out impurities in the water, and prevent white powder from entering the indoor air eliminates messy white powder. 1043 super wick humidifier filter keep the air fresh. 1043 essick air humidifier filters adopts a multi-layer structure, which can efficiently purify impurities from coarse to fine to create a healthier and more comfortable environment. 1043 space saver humidifier filter helps make the air moist and breathable in winter,maximum moisture output, improve air.1043 humidifier filter create a healthy and comfortable environment air and meet the demand of your [SAVE TIME AND ENERGY]:1043 Humidifier Filters is easy to replace, Simply remove the older filter and replace,no tools required, just cost you few minutes. We recommend you to replace the 1043 filter every 2-3 months for optimal performance,and only use distilled water to fill the humidifier tank. (NOTE: When you get the dreaded "F" flickering after installation, you'll need to reposition the top so that the sensor is in contact with the water level rod to fix this) Colour:As Shown Material:filter paper Package Contents: 2 * humidifier filters 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.