Humidifier Replacement Filter: Compatible with Levoit ultrasonic 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 dispersing into the air. Supports efficient humidification for healthier use. Value Package: Each pack contains 30 replacement filters for LV600S humidifiers. For optimal performance, replace filters every 15–30 days depending on water hardness. Clean the humidifier at least once per week. Material: Filter cotton. Due to manufacturing variations, appearance and printed text may differ slightly between batches. These differences do not affect functionality. Package Contents: 30 top-fill humidifier replacement filters. Other items are not included. Note: Color may vary slightly due to lighting and screen settings. Measurement tolerance is ±1–3 cm.