Humidifier Replacement Filter: Compatible with for ultrasonic humidifiers in LV600S or LV600HH or OasisMist600S or Superior 6000S or Classic160 or Dual 200S or Dual 150 or Classic 300 or Classic 300S or OasisMist450S model series. Please confirm your humidifier model before purchase Filtration Function: This humidifier replacement filter for is designed to capture and filter fine impurities and particles, reducing water hardness and preventing white powder from entering the indoor air and being deposited wherever it is seen. the humidifier has higher humidification efficiency for healthier use Value Package: Each pack contains 30 x LV600S Humidifier Replacement Filters for . We recommend that you change the filters every 15-30 days for optimal humidifier performance (depending on water hardness). Also clean the humidifier at least once a week to smooth operation Colour:As Shown Material:Filter cotton Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 30 x Top Fill Humidifier Replacement Filters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.