Fill material Type Water Filter Sponge ensures effective filtration and moisture retention. Fabric Type Water Filter Sponge enhances air quality by maintaining optimal humidity levels. Specifically designed to filter out hardness minerals in water, preventing white powder residue in the air. Recommended filter replacement every 15-30 days for optimal performance and air quality. Compatible with for Humidifier Filter works with humidifiers in the LV600S, Dual 200S, Dual 150, Classic 300, Classic 300S, for OasisMist 450S model series. This water filter sponge is designed to improve air quality by adding moisture to dry environments. It effectively filters out minerals from the water, preventing the formation of white dust that can settle on surfaces. Regular replacement of the filter is advised to the best performance and maintain a healthy atmosphere in your space. Compatible with various humidifier models, it is an essential accessory for maintaining optimal humidity levels. Color: As Shown Material: Sponge Package Contents: 20*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.