Humidifier Replacement Filter: Compatible with Levoit ultrasonic humidifiers in LV600S, LV600HH, OasisMist600S, Superior 6000S, Classic160, Dual 200S, Dual 150, Classic 300, Classic 300S, and OasisMist450S model series. Please confirm your humidifier model before purchase. Filtration Function: This replacement filter is designed to capture and filter fine impurities and particles, reduce water hardness, and help prevent white dust from being released into the air. Helps maintain efficient humidification performance for healthier use. Value Package: Each pack contains 30 replacement filters for Levoit LV600S models. It is recommended to replace the filter every 15 to 30 days depending on usage and water conditions. Regular cleaning of the humidifier is also advised to ensure proper operation. Color: As shown Material: Filter cotton Note: Due to different production batches, slight variations in appearance or printed text may occur. These differences do not affect product functionality. Package Contents: 30 x Top Fill Humidifier Replacement Filters