1. The Newly Updated Wf2 Humidifier Filter Uses Reinforced Mesh Structure, Which Can Filter Hardness Minerals in Water and Prevent White Powder from Entering Indoor Air. 2. Wf2 Humidifier Filter Fits Vicks 3000 Series: V3100, V3500, V3500n, V3600, V3700, V3800, V3850, V3850juv, V3900, Vev320; Fits Hone-Ywell Hcm630, Hcm631, Hcm645, Hcm650, Hcm300t, Hcm350, Hcm1000, Hcm2000, Hcm540 Series; Scm1118, Scm1119, Scm1120 3. The Upgraded Honeycomb Carbon Filter Is Designed to Absorb Surface Area Better Than Other Filters. Use Advanced Technology to Ensure Moisture Absorption and Water to Improve Performance, Helping You Create a Fresh and Pleasant Comfort Environment. 4. For Better Results, It Is Recommended to Fill the Humidifier Tank with Distilled Water and Replace the Wick Every 2-3 Months. Regular Replacement Maintains a Clean Air Environment and Extends the Life of the Humidifier. Let You Enjoy a Healthier and Happier Life. Material: Cotton Filter Color: White Package Contents: 3 X Humidifier Filter Only Above Package Contents, Other Products Not Included. Note: Due to Light Reflection and Different Displays, The Color Of The Item In The Picture May Be Slightly Different From The Actual Color.Measurement Error +/- 1-3Cm.