Great Compatibility: WF2 humidifier filter replacement compatible with a wide range of Vicks, Kaz, Sunbeam, Honeywell, Envira Caire, and ReliOn humidifiers. Fits Vicks Starry Night cool mist humidifier and vaporizer models: V3100, V3500, V3600, V3700, V3800, V3850, V3850JUV, V3900, V3900JUV, and VEV400 series. Also fits Kaz 3020; Sunbeam SCM1118, SCM1119, SCM1120; Honeywell HCM300T, HCM315T, HCM350, HCM350B, HCM630, HCM631, HCM645, HCM650, HCM1000, HCM2000, HCM540 series, and HCM710. Replacement part number: WF2, PWF2. High Efficiency Performance: This WF2 humidifier filter improves air quality by effectively reducing minerals and impurities from hard water, helping to minimize white dust while maintaining beneficial mineral elements. It adds moisture to the air to support better sleep, maintain skin hydration, and relieve discomfort caused by dry air. Superior Quality: The WF2 humidifier filter features hot glue strips and a dense construction made from high-quality, environmentally friendly wood pulp paper. It uses an advanced lower-density structure technology for optimal wicking performance, matching original equipment specifications and maximizing surface area for efficient moisture dispersion. Environmentally Friendly Material: Ensures consistent, healthy, and comfortable indoor air quality. Value Pack: Includes 4 WF2 humidifier filters. For best results, replace filters every two months depending on usage and water hardness. Regular maintenance is recommended once per month. Before first use with Kaz models, soak the filter in water to ensure proper saturation and consistent performance. Material: Wood pulp paper Color: As shown Package Contents: 4 x filter Note: Color may vary slightly due to screen settings and lighting conditions. Measurement tolerance: ±1–3 cm.