Features x Fill material Type Water Filter Sponge x Fabric Type Water Filter Sponge x It really helps make the air moist and breathable in dry weather. x Specific Uses For Product Our humidifier filter replacement does a very good job of filtering out the hardness minerals in the water and x Prevents a white powder from entering the room air and depositing on everything in sight x We recommend you to replace the filter every 15-30 days for optimal performance x Compatible with for LEVOIT Humidifier Filter works with humidifiers in the LV600S Dual 200S Dual 150/ Classic 300 Classic 300S OasisMist450S model series Package Contents: 10 x sponge filter Note: 1, The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2, Please allow slight manual measurement deviation for the data. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.