Think Crucial 3 Replacements for Graco 4 Gallon Humidifier Filter Fits Model 2H02 & TrueAir 05521 HIGH QUALITY FILTER that can replace your humidifier's filter. Get back to having a clean air to breathe again! HEALTHIER LIFESTYLE! No one wants breathe dirty air in their home and if you don't clean your air filter that will be exactly what you'll be doing! Replacing your filter will help clean your humidifier's air and allow for a healthier lifestyle! This filter helps keep our household dust, pollen and mold spores. This filter fits Graco 2H02 & TrueAir 05521. SAVE MONEY by using a new air filter! When your humidifier has a clogged or dirty air filter it can cause it to work harder which will end up hurting your electric bill! this filter is comparable to part # 2H02 & # 05521. EASY TO INSTALL so you can get back to breathing in clear air as soon as possible! Simply remove your old filter and put this brand new one in it's place! GUARANTEED SATISFACTION because of a 30 day full money bank guarantee and a trusted Think Crucial warranty. We are so confident in our products that we have no problem giving you every penny back if you're unhappy with your purchase. You won't see promises like that from big box brands!