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 and promotes healthier indoor air. Value Package: Each pack contains 20 replacement filters. It is recommended to replace the filter every 15 to 30 days for optimal performance, depending on water quality. Regular cleaning of the humidifier is also advised to ensure proper operation. Color: As shown in photo Material: Filter cotton Package Contents: 20 x Humidifier Replacement Filters Note: Due to lighting and screen setting differences, the item's color may vary slightly from the images. Slight dimensional variations may occur due to manual measurement.