1. : Maximize moisture output from the humidifier. The humidifier filter boosts your indoor humidity level by adding moisture into the air in your indoor spaces. 2. & - : Composed of high-quality filter paper for extra absorbency, better moisture output and longer use. 3.- : This filter has the capability to captures mineral pollutants from hard water to stop white dust, provides you more y and comfortable air to breathe in. 4. : An evaporative humidifier is only as good as the wick inside it. The sturdy, fine and dense mesh is not easy to collapse and can be used for a longer time. For optimum performance, replace your wick at the beginning of each season or every 2 months depending on on usage and hardness of water. 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.