Humidifier Replacement Filter: Compatible with Levoit ultra humidifiers models LV600S, LV600HH, OasisMist600S, Superior 6000S, Classic160, Dual 200S, Dual 150, Classic 300, Classic 300S, and OasisMist450S. Please confirm your humidifier model before purchase. Filtration Function: This replacement filter is designed to capture fine impurities and particles, reduce water hardness, and help prevent white dust from entering indoor air. Supports efficient humidification for healthier use. Value Package: Each pack contains 30 LV600S humidifier replacement filters. For optimal performance, replace filters every 15–30 days depending on water hardness. Clean the humidifier at least once per week. Color: As shown Material: Filter cotton Due to manufacturing variations, slight differences in appearance and printed text may occur. These do not affect functionality. Package Contents: 30 top-fill humidifier replacement filters. Other items are not included. Note: Lighting conditions and display settings may cause slight color variation between the image and the actual product. Measurement tolerance: ±1–3 cm.