This humidifier wick replacement filter traps water impurities and dissolves solids before they become airborne. It will fight against the growth of bacteria， mold， and fungus， to relieve dry sinuses and cold symptoms. Please note that this is a replacement/aftermarket product， not an OEM product. Any brand names or logos are the registered trademarks of their respective owners and is made solely for purposes of demonstrating compatibility.

4 Gal. replacement humidifier filters (5-pack) - by LifeSupplyUSA

Compare to Graco 2H02/2H03 and true air 05520/05521

Filters minerals and pollutants from water before they are fed into the air and helps control dust/dirt buildup inside humidifier

Suggested replacement at least every 4-months with normal use